FOX ESS Photovoltaik-Anlage

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Allgemeines

Meine Photovoltaik-Anlage besteht aus den Komponenten:

  • FOX ESS H3-Pro Wechselrichter
  • Fox EK11 Akku
  • Fox A011KS1-E-2 Wallbox

Downloadbereich Fox Downloadbereich Fox (veraltet?)

Durch die Registerliste (MODBUS RTU) ist diese Seite doch auch wieder recht lang geworden. Die XML-Datei (Konvertierung) und die Programme werde ich auf eine eigene Seite auslagern.

H3-Pro Wechselrichter

FOXESS H3-Pro Schnittstellen.png

Bisher hierhin ist mit Grid, EPS, Akku, DC alles klar nur bei den Com-Schnittstellen wird es etwas verworren.

Der Stecker J WiFi/GPRS/LAN (optional) ist ein USB-Port der wohl nur diese speziellen Module bedienen kann.

Bei den Steckern P und Q geht es aber irgendwie munter durcheinander.

FOXESS H3-PRO PQ.png

P wird als COM1-12PIN und Q als COM2-24PIN in der (Stuecklisten-)Tabelle angegeben.

Diese Bezeichungen finden sich schwer oder gar nicht im Manual wieder.

IMG 3970.JPG

Hier mal ein paar Nahaufnahmen Stecker P.

  • IMG 3982.JPG
  • IMG 3981.JPG
  • IMG 3980.JPG

Der Stecker P hat auf der einen Seite 8 PCB Kontakte und auf der anderen Seite 4 PCB Kontake.

Belegung
1 DRY RLY2- 13
2 DRY RLY2+ 14
3 DRY RLY1- 15
4 DRY RLY1+ 16
5 NC NC
6 NC NC
7 Meter 485A 1
8 Meter 485B 2
9 GND TVS (Transient Voltage Suppressor?) 3
10 GND COM 4
11 +12V SELV 5
12 RY Ctrl 6
13 NC NC
14 NC NC
15 NC NC
16 NC NC
17 EMS 485A 7
18 EMS 485B 8
19 NC
20 NC

In Wechselrichtern wie dem Fox ESS H3 Pro sind TVS-Dioden typischerweise in den folgenden Bereichen integriert:

  • DC-Eingänge: Schutz der Photovoltaik-Eingänge vor Überspannungen.
  • Kommunikationsschnittstellen: Absicherung von RS485-, CAN- oder USB-Ports gegen elektrostatische Entladungen.
  • AC-Ausgänge: Schutz der Netzanschlüsse vor transienten Überspannungen aus dem Stromnetz.

Und hier ein paar Nahaufnahmen Stecker Q.

  • IMG 3974.JPG
  • IMG 3975.JPG
  • IMG 3976.JPG
  • IMG 3978.JPG
  • IMG 3979.JPG

Register Liste

Was schon mal gleich nervt ist die Verfuegbarkeit des Modbus Protocol und Register Dokuments der FOXESS H3 Pro Baureihe.

FOXESS Inverter Modbus Definition Deckblatt.png

Bei FOX bin ich auf der Homepage nicht fuendig geworden, nur Scribd bietet es an.

Ab hier ein Transcript.

Die Tabellen dienen mir auch als Grundlage zum erstellen der XML/JSON-Dateien, die ich als Config fuer meine Programme [eigene Seite folgt] benutze. 

Marked * are only supported by some models or standard codes.

Abkuerzungen

Terms and abbreviation definitions
Name Description
master node In master-slave communication, the party that actively initiates communication is called the master node.
slave node In master-slave communication, the party that passively responds to commands is called a slave node.
broadcast address Fixed to 0
Register address The register address corresponds to a 2-byte message
U16 Unsigned 16-bit integer
U32 Unsigned 32-bit integer
I16 Signed 16-bit integer
I32 Signed 32-bit integer
STR string
MLD multibyte
Bitfield16 16-bit wide bitwise representation of data
Bitfield32 32-bit wide bitwise representation of data
s Second
INV inverter
BMS battery management system
RO Read-only data
RW Readable and writable data
WO Write data only

Inverter Model

Inverter model definition table
Serial number Signal name Read and write Type Unit Gain Address Number Scope
regid code readwrite datatype unit factor address count name
1 Model name RO STR N/A 1 30000 16
2 SN RO STR N/A 1 30016 16
3 MFG ID RO STR N/A 1 30032 16 H3Pro15.0 not working!? 
localhost:~ # modbuspoll -v /dev/ttyUSB0 -1 -m rtu -a 1 -r 30001 -c 16 -t 4:string -b 9600 -d 8 -s 1 -P none
debug enabled
Set mode=rtu
iGetIntList(1)
Integer found: 1
iCount=1
iGetIntList(30001)
Integer found: 30001
iCount=1
Set number of values=16
Set function=4
Set format=string
Set rtu baudrate=9600
Set rtu data bits=8
Set rtu stop bits=1
Set rtu parity=none
Set device=/dev/ttyUSB0
mbpoll 1.0-0 - ModBus(R) Master Simulator
Copyright (c) 2015-2023 Pascal JEAN, https://github.com/epsilonrt/mbpoll
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions; type 'mbpoll -w' for details.

Opening /dev/ttyUSB0 at 9600 bauds (N, 8, 1)
Set response timeout to 1 sec, 0 us
Protocol configuration: ModBus RTU
Slave configuration...: address = [1]
                        start reference = 30001, count = 16
Communication.........: /dev/ttyUSB0,       9600-8N1 
                        t/o 1.00 s, poll rate 1000 ms
Data type.............: 16-bit register, output (holding) register table

-- Polling slave 1...
[01][03][75][30][00][10][5E][05]
Waiting for a confirmation...
<01><03><20><20><20><48><33><2D><50><72><6F><2D><31><35><2E><30><20><20><20><00><00><00><00><00><00><00><00><00><00><00><00><00><00><00><00><62><9B>
[30001]:          
[30002]:        H3
[30003]:        -P
[30004]:        ro
[30005]:        -1
[30006]:        5.
[30007]:        0 
[30008]:          
[30009]: 
[30010]: 
[30011]: 
[30012]: 
[30013]: 
[30014]: 
[30015]: 
[30016]:

Inverter Version

Inverter version definition table
Serial number Signal name Read and write Type Unit Gain Address Number Scope
4 Master Version RO U16 N/A N/A 36001 1
5 Slave Version RO U16 N/A N/A 36002 1
6 Manager Version RO U16 N/A N/A 36003 1
7 Meter1 SN RO STR N/A N/A 36100 16
8 Meter1 MFG ID RO STR N/A N/A 36116 16
9 Meter1 TYPE RO STR N/A N/A 36132 16
10 Meter1 Version RO STR N/A N/A 36148 1
11 Meter2 SN RO STR N/A N/A 36200 16
12 Meter2 MFG ID RO STR N/A N/A 36216 16
13 Meter2 TYPE RO STR N/A N/A 36232 16
14 Meter2 Version RO STR N/A N/A 36248 1

Batterie Register

Battery version definition table
Serial number Signal name Read and write Type Unit Gain Address Number Scope
15 BMS1 Connection Status RO U16 N/A N/A 37002 1 0: Offline 1: Online
16 BMS1 Master version RO U16 N/A N/A 37003 1
17 BMS1 Master Control Type RO U16 N/A N/A 37004 1
18 BMS1 Master Control SN RO STR N/A N/A 37005 16
19 Number of BMS1 Slave Controls RO U16 N/A 1 37032 1 Range: [0,32] 0: Does not exist
20 BMS1 Slave 1 version RO U16 N/A N/A 37033 1 Maximum support for 32 channels of slave control. The number of channels actually read by the host computer is in accordance with the number of channels defined in "BMS1 Number of Slaves". The corresponding version of each battery: 37033 + (n - 1), where n is the number of slaves in the range of [1, 32].
21 BMS1 Slave 2 version RO U16 N/A N/A 37034 1
22 BMS1 Slave 1 SN RO STR N/A N/A 37097 16 Maximum support for 32 channels of slave control. The number of channels actually read by the host computer is in accordance with the number of channels defined in "BMS1 Number of Slaves". The corresponding version of each battery: 37097 + (n - 1), where n is the number of slaves in the range of [1, 32]. Anmerkung: Hier scheint ein Fehler in der Beschreibung vorzuliegen. Die Bemerkung bezieht sich wohl eher auf Register 37034!?
23 BMS1 Slave 2 SN RO STR N/A N/A 37113 16
24 BMS1 Voltage RO U16 V 10 37609 1
25 BMS1 Current RO I16 A 10 37610 1
26 BMS1 Ambient Temperature RO I16 °C 10 37611 1
27 BMS1 SOC RO U16 % 1 37612 1
28 BMS1 Max Temperature RO I16 °C 10 37617 1
29 BMS1 Min Temperature RO I16 °C 10 37618 1
30 BMS1 Max Cell Voltage RO U16 mV 1 37619 1
31 BMS1 Min Cell Voltage RO U16 mV 1 37620 1
32 BMS1 SOH RO U16 % 1 37624 1
33 BMS1 Fault1 RO Bitfield16 N/A N/A 37626 1
34 BMS1 Fault2 RO Bitfield16 N/A N/A 37627 1
35 BMS1 Fault3 RO Bitfield16 N/A N/A 37628 1
36 BMS1 Fault4 RO Bitfield16 N/A N/A 37629 1
37 BMS1 Fault5 RO Bitfield16 N/A N/A 37630 1
38 BMS1 Fault6 RO Bitfield16 N/A N/A 37631 1
39 BMS1 Remain Energy RO U16 Wh 0.1 37632 1
40 BMS1 FCC Capacity RO U16 Ah 10 37633 1
41 reserve RO U16 N/A N/A 37634 1
42 BMS1 Design Energy Ro U16 Wh 0.1 37635 1
43 BMS1 Force to Change Battery Flag RO U16 N/A N/A 37636 1 Range:[0, 1] 0:Reset 1:Set Note: If set, pcs schould charge the battery until the status is reset.
44 BMS2 Connection Status RO U16 N/A N/A 37700 1 0: Offline 1: Online
45 BMS2 Master version RO U16 N/A N/A 37701 1
46 BMS2 Master Control Type RO U16 N/A N/A 37702 1
47 BMS2 Master Control SN RO STR N/A N/A 37703 16
48 Number BMS2 of Slave Controls RO U16 N/A 1 37730 1 Slaves:[0,32] 0:Does not exist
49 BMS2 Slave 1 version RO U16 N/A N/A 37731 1 Maximum support for 32 channels of slave control. The number of channels actually read by the host computer is in accordance with the number of channels defined in "BMS2 Number of Slaves". The corresponding version of each battery: 37730 + (n -1), where n is the number of slaves in the range of [1, 32].
50 BMS2 Slave 2 version RO U16 N/A N/A 37732 1
51 BMS2 Slave 1 SN RO STR N/A N/A 37795 16 Maximum support for 32 channels of slave control. The number of channels actually read by the host computer is in accordance with the number of channels defined in "BMS1 Number of Slaves". The corresponding version of each battery: 37395 + 16* (n - 1), where n is the number of slaves in the range of [1, 32]. Anmerkung: Hier scheint ein Fehler in der Beschreibung vorzuliegen. Die Bemerkung bezieht sich wohl eher auf Register 37034!?
52 BMS2 Slave 2 SN RO STR N/A N/A 37811 16
53 BMS2 Voltage RO U16 V 10 38307 1
54 BMS2 Current RO I16 A 10 38308 1
55 BMS2 AmbientTemperature RO I16 °C 10 38309 4
56 BMS2 SOC RO U16 % 1 38310 1
57 BMS2 Max Temperature RO I16 °C 10 38315 1
58 BMS2 Min Temperature RO I16 °C 10 38316 1
59 BMS2 Max Cell Voltage RO U16 mV 1 38317 1
60 BMS2 Min Cell Voltage RO U16 mV 1 38318 1
61 BMS2 SOH RO U16 % 1 38322 1
62 BMS2 Fault1 RO Bitfield16 N/A N/A 38324 1
63 BMS2 Fault2 RO Bitfield16 N/A N/A 38325 1
64 BMS2 Fault3 RO Bitfield16 N/A N/A 38326 1
65 BMS2 Fault4 RO Bitfield16 N/A N/A 38327 1
66 BMS2 Fault5 RO Bitfield16 N/A N/A 38328 1
67 BMS2 Fault6 RO Bitfield16 N/A N/A 38329 1
68 BMS2 Remain Energy RO U16 Wh 0.1 38330 1
69 BMS2 FCC Capacity RO U16 Ah 10 38331 1
70 reserve RO U16 N/A N/A 38332 1
71 BMS1 Design Energy Ro U16 Wh 0.1 38333 1
72 BMS1 Force to Change RO U16 Wh 0.1 38334 1 Range: [0, 1] 0: Reset 1: Set Note: If set, pcs schould charge the battery until the status is reset

Meter Register

Register definition table
Serial number Signal name Read and write Type Unit Gain Address Number Scope
73 Meter1/CT1 Connect State RO U16 N/A N/A 38801 1 0:Disconnect 1:Connect
74 Meter1/CT1 R Phase Voltage (L1) RO I32 V 10 38802 2
75 Meter1/CT1 S Phase Voltage (L2) RO I32 V 10 38804 2
76 Meter1/CT1 T Phase Voltage (L3) RO I32 V 10 38806 2
77 Meter1/CT1 R Phase Current (L1) RO I32 A 1000 38808 2
78 Meter1/CT1 S Phase Current (L2) RO I32 A 1000 38810 2
79 Meter1/CT1 T Phase Current (L3) RO I32 A 1000 38810 2
80 Meter1/CT1 Combined Active Power RO I32 W 10 38814 2
81 Meter1/CT1 R Phase Active Power (L1) RO I32 W 10 38816 2
82 Meter1/CT1 S Phase Active Power (L2) RO I32 W 10 38818 2
83 Meter1/CT1 T Phase Active Power (L3) RO I32 W 10 38820 2
84 Meter1/CT1 Combined Reactive Power RO I32 Var 10 38822 2
85 Meter1/CT1 R Phase Reactive Power (L1) RO I32 Var 10 38824 2
86 Meter1/CT1 S Phase Reactive Power (L2) RO I32 Var 10 38826 2
87 Meter1/CT1 T Phase Reactive Power (L3) RO I32 Var 10 38828 2
88 Meter1/CT1 Combined Apparent Power RO I32 VA 10 38830 2
89 Meter1/CT1 R Phase Apparent Power (L1) RO I32 VA 10 38832 2
90 Meter1/CT1 S Phase Apparente Power (L2) RO I32 VA 10 38834 2
91 Meter1/CT1 T Phase Apparent Power (L3) RO I32 VA 10 38836 2
92 Meter1/CT1 Combined Power Factor RO I32 N/A 1000 38838 2
93 Meter1/CT1 R Phase Power Factor (L1) RO I32 N/A 1000 38840 2
94 Meter1/CT1 S Phase Power Factor (L2) RO I32 N/A 1000 38842 2
95 Meter1/CT1 T Phase Power Factor (L3) RO I32 N/A 1000 38844 2
96 Meter1/CT1 Freq RO I32 Hz 100 38846 2
97 Meter2/CT2 Connect State RO U16 N/A N/A 38901 1 0:Disconnect 1:Connect
98 Meter2/CT2 R Phase Voltage (L1) RO I32 V 10 38902 2
99 Meter2/CT2 S Phase Voltage (L2) RO I32 V 10 38904 2
100 Meter2/CT2 T Phase Voltage (L3) RO I32 V 10 38906 2
101 Meter2/CT2 R Phase Current (L1) RO I32 A 1000 38908 2
102 Meter2/CT2 S Phase Current (L2) RO I32 A 1000 38910 2
103 Meter2/CT2 T Phase Current (L3) RO I32 A 1000 38910 2
104 Meter2/CT2 Combined Active Power RO I32 W 10 38914 2
105 Meter2/CT2 R Phase Active Power (L1) RO I32 W 10 38916 2
106 Meter2/CT2 S Phase Active Power (L2) RO I32 W 10 38918 2
107 Meter2/CT2 T Phase Active Power (L3) RO I32 W 10 38920 2
108 Meter1/CT1 Combined Reactive Power RO I32 Var 10 38922 2
109 Meter2/CT2 R Phase Reactive Power (L1) RO I32 Var 10 38924 2
110 Meter2/CT2 S Phase Reactive Power (L2) RO I32 Var 10 38926 2
111 Meter2/CT2 T Phase Reactive Power (L3) RO I32 Var 10 38928 2
112 Meter2/CT2 Combined Apparent Power RO I32 VA 10 38930 2
113 Meter2/CT2 R Phase Apparent Power (L1) RO I32 VA 10 38932 2
114 Meter2/CT2 S Phase Apparente Power (L2) RO I32 VA 10 38934 2
115 Meter2/CT2 T Phase Apparent Power (L3) RO I32 VA 10 38936 2
116 Meter2/CT2 Combined Power Factor RO I32 N/A 1000 38938 2
117 Meter2/CT2 R Phase Power Factor (L1) RO I32 N/A 1000 38940 2
118 Meter2/CT2 S Phase Power Factor (L2) RO I32 N/A 1000 38942 2
119 Meter2/CT2 T Phase Power Factor (L3) RO I32 N/A 1000 38944 2
120 Meter2/CT2 Freq RO I32 Hz 100 38946 2

MPPT und EPS

Register definition table
Serial number Signal name Read and write Type Unit Gain Address Number Scope
121 Protocol Version RO U32 N/A N/A 39000 2 For example 0x01020304 indicates version V1.02.03.04 and the initial version is V1.01.00.00
122 Model name RO STR N/A 1 39002 16
123 SN RO STR N/A 1 39018 16
124 PN RO STR N/A 1 39034 16
125 Model ID RO U16 N/A 1 39050 1
126 Number of strings RO U16 N/A 1 39051 1
127 Number of MPPTs RO U16 N/A 1 39052 1
128 Rated Power P(n) RO I32 kW 1000 39053 2
129 Maximum active power (Pmax) RO I32 kW 1000 39055 2
130 Maximum apparent value (Smax) RO I32 kVA 1000 39057 2
131 Maximum reactive power (Qmax, fed into the grid) RO I32 kVar 1000 39059 2
132 Maximum reactive power (Qmax, absorbed from the grid) RO 132 kVar 1000 39061 2
133 Status 1 RO Bitfield 16 N/A 1 39063 1 BitO: Standby Bit1: Reserved Bit2: Operation Bit3: Reserved Bit4: Reserved Bit5: Reserved Bit6: Fault Bit7: Reserved
134 reserve RO Bitfield 16 39064 1
135 Status 3 RO Bitfield 32 N/A 1 39065 2 Bit0: Off-grid or not 0: Not off-grid 1: Off-grid
136 Alarm 1 RO Bitfield 16 N/A 1 39067 1 Refer to 4.1 Alarm information
137 Alarm 2 RO Bitfield 16 N/A 1 39068 1 Refer to 4.1 Alarm information
138 Alarm 3 RO Bitfield 16 N/A 1 39069 1 Refer to 4.1 Alarm information
139 PV1 voltage RO I16 V 10 39070 1 [Supports up to 24 channels of string information. The actual number of reading channels of the host computer is based on the number of channels defined by "number of strings". The actual corresponding voltage and current register addresses of each string are PVn voltage: 39070 + 2 * (n - 1), = PVn current: 39071 + 2 * (n— 1). Where n is the string number range is [1,24]
140 PV1 current RO 116 A 100 39071 1
141 PV2 voltage RO I16 V 10 39072 1
142 PV2 current RO 116 A 100 39073 1
143 PV3 voltage RO I16 V 10 39074 1
144 PV3 current RO 116 A 100 39075 1
145 PV4 voltage RO I16 V 10 39076 1
146 PV5 current RO 116 A 100 39077 1
147 Total PV input power RO I32 kW 1000 39118 2
148 reserve RO U16 39120 1
149 reserve RO U16 39121 1
150 reserve RO U16 39122 1
151 Grid R phase voltage RO I16 V 10 39123 1
152 Grid S phase voltage RO I16 V 10 39124 1
153 Grid T phase voltage RO I16 V 10 39125 1
154 Inverter R current RO I32 A 1000 39126 2
155 Inverter S current RO I32 A 1000 39128 2
156 Inverter T current RO I32 A 1000 39130 2
157 reserve RO U32 39132 2
158 Active power RO I32 kW 1000 39134 2
159 Reactive power RO I32 kVar 1000 39136 2
160 power factor RO I16 N/A 1000 39138 2
161 Grid frequency RO I16 Hz 100 39139 1
162 reserve RO U16 39140 2
163 internal temperature RO I16 °C 10 30141 1
164 reserve RO U16 39142 1
165 reserve RO U16 39143 1
166 reserve RO U16 39144 1
167 reserve RO U32 39145 2
168 reserve RO U32 39147 2
169 Cumulative powergeneration RO U32 kWh 100 39149 2
170 Power generation on the day RO U32 kWh 100 39151 2
171 reserve RO U16 39153 1
172 reserve RO U32 39154 2
173 reserve RO U16 39156 1
174 reserve RO U16 39157 1
175 reserve RO U32 39158 2
176 reserve RO U16 39160 1
177 reserve RO U16 39161 1
178 [Energy storage module 1] Charge and discharge power * RO I32 W 1 39162 2 > 0: charging < 0: discharging
179 reserve RO U32 39164 2
180 reserve RO U32 39166 2
181 [Meter collection] Active power * RO I32 W 1 39168 2 > 0: Feed power to the grid < 0: Take power from the grid
182 reserve RO U16 39170 1
183 reserve RO U16 39171 1
184 reserve RO U16 39172 1
185 reserve RO U16 39200 1
186 EPS R Phase Voltage RO U16 V 10 39201 1
187 EPS S Phase Voltage RO U16 V 10 39202 1
188 EPS T Phase Voltage RO U16 V 10 39203 1
189 EPS R Phase Current RO I32 A 1000 39204 2
190 EPS S Phase Current RO I32 A 1000 39206 2
191 EPS T Phase Current RO I32 A 1000 39208 2
192 EPS R Phase Power RO I32 W 1 39210 2
193 EPS S Phase Power RO I32 W 1 39212 2
194 EPS T Phase Power RO I32 W 1 39214 2
195 EPS Combined Power RO I32 W 1 39216 2
196 EPS Frequency RO I16 Hz 100 39218 1
197 Load R Phase Power RO I32 W 1 39219 2
198 Load S Phase Power RO I32 W 1 39221 2
199 Load T Phase Power RO I32 W 1 39223 2
200 Load Combined Power RO I32 W 1 39225 2
201 Battery1 Voltage _ RO I16 V 10 39227 1
202 Battery1 Current _ RO I32 A 1000 39228 2
203 Battery1 Power _ RO I32 W 1 39230 2
204 Battery2 Voltage _ RO I16 V 10 39232 1
205 Battery2 Current _ RO I32 A 1000 39233 2
206 Battery2 Power _ RO I32 W 1 39235 2
207 Battery Combined Power RO I32 W 1 39237 2
208 reserve RO I16 39239 1
209 reserve RO I16 39240 1
210 reserve RO I16 39241 1
211 reserve RO I32 39242 2
212 reserve RO I32 39244 2
213 reserve RO I32 39246 2
214 INV R Phase Active Power RO I32 W 1 39248 2
215 INV S Phase Active Power RO I32 W 1 39250 2
216 INV T Phase Active Power RO I32 W 1 39252 2
217 reserve RO I32 39254 2
218 INV R Phase Reactive Power RO I32 VAr 1 39256 2
219 INV S Phase Reactive Power RO I32 VAr 1 39258 2
220 INV T Phase Reactive Power RO I32 VAr 1 39260 2
221 reserve RO I32 39262 2
222 INV R Phase A transparent Power RO I32 VA 1 39264 2
223 INV S Phase A transparent Power RO I32 VA 1 39266 2
224 INV T Phase A transparent Power RO I32 VA 1 39268 2
225 INV Combined A transparent Power RO I32 VA 1 39270 2
226 INV Frequency R RO I16 Hz 100 39272 1
227 INV Frequency S RO I16 Hz 100 39273 1
228 INV Frequency T RO I16 Hz 100 39274 1
229 Available Import Power RO I32 W 1 39275 2
230 Available Export Power RO I32 W 1 39277 2
231 PV1 Power RO I32 W 1 39279 2 Maximum support for 24 channels of string information. The number of channels actually read by the host computer is in accordance with the number of channels defined by "number of strings". The voltage and current register corresponding to each string are as follows PVn Power: 39279 + 2 * (n - 1). Where n is the string number range is [1,24]
232 PV2 Power RO I32 W 1 39281 2
233 PV3 Power RO I32 W 1 39283 2
234 PV4 Power RO I32 W 1 39285 2
235 MPPT1 Voltage RO I16 V 10 39327 1 A maximum of 24 strings are supported. The number of strings actually read by the host computer ist defined by the number of strings. The voltage and current register addresses corresponding to ecah string are: MPPTn Volt: 39327 + 4 * (n - 1) MPPTn Current: 39328 + 4 * (n - 1) MPPTn Power: 39329 + 4 * (n - 1) The range of the stringg number is [1,24]
236 MPPT1 Current RO I16 A 100 39328 1
237 MPPT1 Power RO I32 W 1 39329 2
238 MPPT2 Voltage RO I16 V 10 39327 1
239 MPPT2 Current RO I16 A 100 39328 1
240 MPPT2 Power RO I32 W 1 39329 2
241 MPPT3 Voltage RO I16 V 10 39327 1
242 MPPT3 Current RO I16 A 100 39328 1
243 MPPT3 Power RO I32 W 1 39329 2


PV

Register definition table
Serial number Signal name Read and write Type Unit Gain Address Number Scope
244 reserve RO U16 39600 1
245 PV total power RO U32 kWh 100 39601 2
246 PV total power today RO U32 kWh 100 39603 2
247 Total charging capacity RO U32 kWh 100 39605 2
248 Total charging capacity today RO U32 kWh 100 39607 2
249 Total discharge power RO U32 kWh 100 39609 2
250 Total discharge power today RO U32 kWh 100 39611 2
251 Total power of feeder network RO U32 kWh 100 39613 2
252 Total power of feeder network today RO U32 kWh 100 39615 2
253 Total power taken RO U32 kWh 100 39617 2
254 Total electricity consumption today RO U32 kWh 100 39619 2
255 Total power output RO U32 kWh 100 39621 2
256 Total power output today RO U32 kWh 100 39623 2
257 Total power enter RO U32 kWh 100 39625 2
258 Total power enter today RO U32 kWh 100 39627 2
259 Total power load RO U32 kWh 100 39629 2
260 Total power load today RO U32 kWh 100 39631 2

MISC

Register definition table
Serial number Signal name Read and write Type Unit Gain Address Number Scope
261 reserve WO U16 N/A N/A 45000 1
262 reserve WO U16 N/A N/A 45001 1
263 Factory Reset WO U16 N/A N/A 45002 1 Range:[0,1] 0:Invalid 1:Active
264 Battery power active WO U16 N/A N/A 45003 1 Range:[0,1] 0:Invalid 1:Active Note: Only H3 Smart series ist supported.
265 reserve WO U16 N/A N/A 45004 1
266 Battery power shutdown WO U16 N/A N/A 45005 1 Range:[0,1] 0:Invalid 1:Active Note: Only H3 Smart series ist supported.
267 Battery power ON/OFF RO U16 N/A N/A 45006 1 Range:[0,1] 0:OFF 1:ON
268 Battery Connect Enable RW U16 N/A N/A 45007 1 Range:[0,1] 0:Disable 1:Enable Note: Only H3 Smart series ist supported.

REMOTE

Register definition table
Serial number Signal name Read and write Type Unit Gain Address Number Scope
269 reserve RO U16 46000 1
270 Remote Control RW Bitfield 16 N/A 1 46001 1 Bit 0: Remote Control enable 0: Disable 1: Enable Bit 1: Definition for positive direction O: power-generation system 1: power-consumption system Bits 3:2 : Controlled target 00: AC 01: Battery 10: Grid (CT/Meter 11: AC (Grid first) Bits 15:4 Reserved
271 Timeout_ Set RW U16 s 1 46002 1
272 Remote Control Active Power Command RW I32 W 1 46003 2
273 Remote Control Reactive Power Command RW I32 VAr 1 46005 2
273 Remote Timeout Countdown RO U16 s 1 46007 1
275 Pwr_limit Bat_Up RO I32 W 1 46018 2
275 Pwr_limit Bat_Dn RO I32 W 1 46018 2


Limit/Timer

Register definition table
Serial number Signal name Read and write Type Unit Gain Address Number Scope
277 reserve RW U16 46500 1
278 Power Limit * RW 132 W 1 46501 2
279 Threshold SOc * RW U16 % 1 46503 1
280 ExportPeak Limit * RW I32 W 1 46504 2
281 ChrInLowImport * RW U16 N/A 1 46506 1
282 ChrInLowTime1-StartHour * RW U16 N/A 1 46507 1
283 ChrInLowTime1-StartMinute * RW U16 N/A 1 46508 1
284 ChrInLowTime1-EndHour * RW U16 N/A 1 46509 1
285 ChrInLowTime1-EndMinute * RW U16 N/A 1 46510 1
286 ChrInLowTime2-StartHour * RW U16 N/A 1 46511 1
287 ChrInLowTime2-StartMinute * RW U16 N/A 1 46512 1
288 ChrInLowTime2-EndHour * RW U16 N/A 1 46513 1
289 ChrInLowTime2-EndMinute * RW U16 N/A 1 46514 1

Limits

Register definition table
Serial number Signal name Read and write Type Unit Gain Address Number Scope
290 reserve RW U16 46601 1
291 reserve RW U16 46602 1
292 reserve RW U16 46603 1
293 reserve RW U16 46604 1
294 reserve RW U16 46605 1
295 reserve RW U16 46606 1
296 Battery maximum charging current * RW I16 A 10 46607 1 H3:[0,26] H3Pro:[0,50] KH:[0,50] H1:[0,40] H1-G2:[ 0,40]
297 Battery maximum discharge current * RW I16 A 10 46608 1 H3:[0,26] H3Pro:[0,50] KH:[0,50] H1:[0,40] H1-G2:[ 0,40]
298 Minimum SoC * RW U16 % 1 46609 1 [10,100]
299 Maximum SoC * RW U16 % 1 46610 1 [10,100]
300 Minimum SoC OnGrid * RW U16 % 1 46611 1 [10,100]
301 EPS Frequency Select * _ RW U16 N/A N/A 46612 1 0:invalid 1:50Hz 2: 60Hz
302 EPS Oput * _ RW U16 N/A NA 46613 1 0:Disable 2:EPS Mode 3:Ups Mode
303 Balance Load * RW U16 N/A NA 46614 1 O:Disable 1:Enable
304 Balance Logic First * RW U16 N/A NA 46614 1 O:Disable 1:Enable
305 Export Power Limit RW I32 W 1 46616 2 [0,Pmax]
306 Import Current Limit RW 116 A 10 46618 1
307 Export Current Limit RW 116 A 10 46619 1


Add

Register definition table
Serial number Signal name Read and write Type Unit Gain Address Number Scope
308 system time RW U32 N/A N/A 49000 2 [946684800,3155759999] local time
309 reserve RW U16 49002 1
310 reserve RW U16 49003 1
311 reserve RW U16 49004 1
312 [Power Grid Scheduling ] None Power compensation (PF) RW I16 N/A 1000 49005 1 [-1,-0.8] and [0.8, 1]
313 [Power Grid Scheduling] None Power compensation (Q/S) RW I16 N/A 1000 49006 1 [-1.000,+1.000] The equipment end converts this value into a fixed value of Q for reactive power control; where S is Smax
314 [Power grid dispatch] Active power percentage derating (0.1%) RW I16 % 10 49007 1 Active power fine adjustment interface
315 reserve RW U32 49008 2
316 reserve RW U32 49010 2
317 reserve RW MLD 49012 21
318 reserve RW MLD 49033 21
319 reserve RW MLD 49054 21
320 reserve RW U16 49075 1
321 reserve RW U16 49076 1
322 Power on RW U16 N/A N/A 49077 1 Range: [0,1] 0: invalid 1: valid Read the power on/off status and check the register at address 49228
323 Shut down RW U16 N/A N/A 49078 1 Range: [0,1]0: invalid 1: valid Read the power on/off status and check the register at address 49228
324 standard code RW U16 N/A N/A 49079 1 Reference 4.2 Power Grid Standard Code
325 reserve RW U32 49080 2
326 reserve RW U32 49082 2
327 reserve RW U32 49084 2
328 reserve RW U16 49086 1
329 reserve RW U16 49087 1
330 reserve RW U16 49088 1
331 reserve RW MLD 49089 41
332 reserve RW U32 49130 2
333 reserve RW U32 49132 2
334 reserve RW U32 49134 2
335 Grid point power limit RW 132 W 1 49136 2 [0, Pmax] Default value: Pmax
336 reserve RW U16 49138 4
337 reserve RW U16 49139 1
338 reserve RW U16 49140 1
339 reserve RW U32 49141 2
340 reserve RW MLD 49143 41
341 Work mode RW U16 N/A N/A 49203 1 1:Self Use 2:Feedin Priority 3:BackUp 4:Peak Shaving 6:Force Charge 7:Force Discharge
342 DRM RW U16 N/A N/A 49206 1 0: Disable 1: Enable (Only valid under Australian safety regulations)
343 Meter1/CT1 RW U16 N/A N/A 49207 1 0:OFF 1:Meter 1-PHASE 2:CT 3:Meter 3-PHASE
344 Meter2/CT2 RW U16 N/A N/A 49208 1 0:0FF 1:Meter 1-PHASE 2:CT 3:Meter 3-PHASE
345 BUZZER RW U16 N/A N/A 49209 1 0: Disable 1: Enable
346 MPPT Switch RW U16 N/A N/A 49210 1 0: Disable 4: Enable
347 Relay 1 Switch RW U16 N/A N/A 49211 1 O:Disable 1:Enable
348 Relay 2 Switch RW U16 N/A N/A 49212 1 O:Disable 1:Enable
349 Brightness Level RW U16 % 1 49221 1 0-100%“
350 Year RW U16 N/A 1 49222 1 2000-2099
351 Month RW U16 N/A 1 49223 1 1-12
352 Day RW U16 N/A 1 49224 1 1-31
353 Hour RW U16 N/A 1 49225 1 0-23
354 Minute RW U16 N/A 1 49226 1 0-59
355 Second RW U16 N/A 1 49227 1 0-59
356 System Power State RO U16 N/A 1 49228 1 0: Turn OFF 1:Turn ON
357 Idle State RW U16 N/A 1 49229 1 O: Disable 1: Enable
358 Idle Loadpower Threshold RW U16 W 1 49230 1 Range: H3: 100~200 H3Pro: 100~600
359 Clear Count Idle WO U16 N/A N/A 49231 1 0:Clear Idle Count
360 Key Password RW STR N/A 1 49232 8
361 Network status RO U16 N/A 1 49240 1 0:Not connected 1:Disconnection 2: Connection
362 Ripple Control Enable RW U16 N/A 1 49241 1 0:Disable 1:Enable
363 Trigger Signal RO U16 N/A 1 49242 11 BitO: K1 status Bit1: K2 status Bit2: K3 status Bit3: K4 status
364 K1 Power Ratio RW U16 % 1 49243 1 Range:[0, 100]
365 K2 Power Ratio RW U16 % 1 49244 1 Range:[0, 100]
366 K3 Power Ratio RW U16 % 1 49245 1 Range:[0, 100]

Die Testabfrage liefert korrekt das Jahr (20)25. 

localhost:/home/tibb # modbuspoll -v /dev/ttyUSB0 -B -1 -m rtu -a 1 -r 49223 -c 1 -t 4:int16 -b 9600 -d 8 -s 1 -P none
debug enabled
Set mode=rtu
iGetIntList(1)
Integer found: 1
iCount=1
iGetIntList(49223)
Integer found: 49223
iCount=1
Set number of values=1
Set function=4
Set format=int16
Set rtu baudrate=9600
Set rtu data bits=8
Set rtu stop bits=1
Set rtu parity=none
Set device=/dev/ttyUSB0
mbpoll 1.0-0 - ModBus(R) Master Simulator
Copyright (c) 2015-2023 Pascal JEAN, https://github.com/epsilonrt/mbpoll
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions; type 'mbpoll -w' for details.

Opening /dev/ttyUSB0 at 9600 bauds (N, 8, 1)
Set response timeout to 1 sec, 0 us
Protocol configuration: ModBus RTU
Slave configuration...: address = [1]
                        start reference = 49223, count = 1
Communication.........: /dev/ttyUSB0,       9600-8N1 
                        t/o 1.00 s, poll rate 1000 ms
Data type.............: 16-bit register, output (holding) register table

-- Polling slave 1...
[01][03][C0][46][00][01][59][DF]
Waiting for a confirmation...
<01><03><02><00><19><79><8E>
[49223]:        25

Energiepfade

Grid

DRM

DRM Demand Response Mode 

DRM0 steht für "Demand Response Mode 0" und ist Teil eines Systems, das es Netzbetreibern ermöglicht, die Einspeiseleistung von Photovoltaikanlagen zu steuern. Dies geschieht oft über einen Funk-Rundsteuerempfänger (FRE), der Signale an den Wechselrichter sendet, um die Einspeiseleistung zu reduzieren oder ganz zu unterbrechen.

Der Fox ESS H3 Pro Wechselrichter verfügt über einen DRM-Anschluss, an dem externe Steuerungssignale anliegen können. Insbesondere ist Pin 17 für das DRM0-Signal vorgesehen. Wenn ein externer FRE ein Signal sendet, das den Kontakt zwischen DRM0 (Pin 17) und einem der anderen DRM-Pins (z. B. DRM1, DRM2, DRM3) herstellt, erkennt der Wechselrichter dies und passt seine Einspeiseleistung entsprechend an.​

Die verschiedenen DRM-Pins (siehe Kommunikation) entsprechen dabei unterschiedlichen Leistungsstufen:​ 

   DRM1: 100 % Einspeiseleistung
   DRM2: 60 % Einspeiseleistung
   DRM3: 30 % Einspeiseleistung
   DRM4: 0 % Einspeiseleistung​

Wenn beispielsweise DRM0 mit DRM2 verbunden wird, reduziert der Wechselrichter seine Einspeiseleistung auf 60 %.

Was bedeutet DRM0state?

Der Begriff DRM0state bezeichnet den aktuellen Status des DRM0-Eingangs. Er gibt an, ob und welche Verbindung zwischen DRM0 und den anderen DRM-Pins besteht, und somit, welche Einspeiseleistung der Wechselrichter aktuell ausführt.

Kommunikation

Stromzaehler

Im Lieferumfang des FOX ESS Wechselrichters ist ein Stromzaehler der Marke Chint DTSU666 (nicht wie im Manual steht DDSU 666).

DDSU666 = für 1 Phase DTSU666 = für 3 Phasen

Technisch sind sie sich aehnlich (z. B. beide haben Modbus RS485), aber sie unterscheiden sich in der Anzahl der Phasen, die sie messen können. [1]

Anzeige

Chint DTSU666 Display.png

Legende (Kopfzeile):

  • III
  • V
  • Σ Summe
  • Imp. Import NetzBezug
  • Exp. Export Netzeinspeisung
  • T
  • 8
  • NO. Modbus-RTU Adresse = 001, Baudrate = 9600, keine Paritaet, 1 Stopbit
  • TIME
  • (U)
  • (I)
  • Phone Ein Blinken zeigt Kommunikation uerb den RS485-Bus an.

Legende (Seite):

  • kM kilo oder Mega
  • VVAh Watt Ampere Stunden Das VV ist etwas ungluecklich und soll eigentlich ein W sein!
  • varh Voltampere Reaktiv Stunden

Zusaetzlich koennen noch die ersten 7-Segment-Ziffern zur Anzeige von Buchstaben verwendet werden.

  • UA Spannung Phase A (Phase 1)
  • Ub Spannung Phase B (Phase 2)
  • UC Spannung Phase C (Phase 3)
  • IA Strom Phase A (Phase 1)
  • Ib Strom Phase B (Phase 2)
  • IC Strom Phase C (Phase 3)
  • Pt kombinierte Phasenwirkleistung
  • PA Phasenwirkleistung Phase A (Phase 1)
  • Pb Phasenwirkleistung Phase B (Phase 2)
  • PC Phasenwirkleistung Phase C (Phase 3)
  • Ft Leistungsfaktor in einer kombinierten Phasenanlage
  • FA Leistungsfaktor Phase A (Phase 1)
  • Fb Leistungsfaktor Phase B (Phase 2)
  • FC Leistungsfaktor Phase C (Phase 3)

Programmierparameter:

  • Ct 1-9999 Stromadapter-Uebersetzungsverhaeltnis, bei Direktmessung = 1
  • Pt 0.1-999.9 Spannungtransformator-Uebersetzungsverhaeltnis, bei Direktmessung = 1.0
  • Prot 1-5 Kommunikationsparameter (Stop und Parity) 1: 645 Mode; 2: keine Paritaet, 2 Stop Bits n.2; 3: keine Paritaet, 1 Stop Bit n.1; 4: gerade Paritaet, 1 Stop Bit, E.1; 5 ungerade Paritaet, 1 Stop Bit, O.1
  • bAud 0:1200; 1:2400; 2:4800; 3:9600; 4:19.200 bps
  • Addr 1-247
  • nEt 0: n.34 3-Phasen vier Leitungen; 1: n.33 3-Phasen drei Leitungen
  • CLr.E 0:n0; 1:E 1 loesche Energie
  • PLuS 0:P; 1:Q; 2:? 0: Puls bei Wirkenergie 1: Puls bei Blindenergie 2: Andere?
  • dISP 0-30 Zeitintervall der Anzeige in Sekunden
  • b.LCd 0-30 Hintergrundbeleuchtung der Anzeige in Sekunden

Das Passwort lautet 701

RS485

Standardmaeszig ist beim Modbus-RTU-Protokoll als Baudrate 9600 bps Paritaet 1 Stopbit (n.1) und die Adresse 1 eingestellt.

Das Modbus-RTU Lesekommando ist 03H und das Schreibkommando 10H.

Parameter address Parameter code Instructions of parameters Data type Data length Word Read/Write
Settings
0000H REV. Software Version Signed 1 R
0001H UCode Programming code codE(1~9999) Signed 1 R/W
0002H CLr.E Energy reset CLr.E(1:energy clear) Signed 1 R/W
0003H net Network selection (0:three phase four wire,1:three phase three wire) Signed 1 R/W
0006H IrAt Current transformer rate IrAt(1~9999) Signed 1 R/W
0007H UrAt Voltage transformer rate UrAt(*) (1~9999 represents voltage ratio 0.1~999.9) Signed 1 R/W
000AH Disp Rotating display time(s) Signed 1 R/W
000BH B.LCD Backlight time control(m) Signed 1 R/W
000CH Endian Reserve Signed 1 R/W
002CH 44D Protocol Protocol switching (1:DL/T645; 2:n.2; 3:n.1; 4:E.1; 5:o.1) Signed 1 R/W
002DH 45D bAud Communication baud rate bAud (0:1200; 1:2400; 2:4800; 3:9600;) Signed 1 R/W
002EH 46D Addr Communication address Addr(1~247) Signed 1 R/W
Electricity data
2000H 8192D Uab Three phase line voltage data, Unit V(×0.1V) float 2 R
2002H Ubc float 2 R
2004H Uca float 2 R
2006H Ua Three phase phase voltage data, Unit V V(×0.1V)(Invalid for three phase three wire) float 2 R
2008H Ub float 2 R
200AH Uc float 2 R
200CH Ia Three phase current data, Unit A(×0.001A) float 2 R
200EH Ib float 2 R
2010H Ic float 2 R
2012H Pt Combined active power, Unit W(×0.1W) float 2 R
2014H Pa A phase active power, Unit W(×0.1W) float 2 R
2016H Pb B phase active power, Unit W(×0.1W)(Invalid for three phase three wire) float 2 R
2018H Pc C phase active power, Unit W(×0.1W) float 2 R
201AH Qt Combined reactive power, Unit var(×0.1var) float 2 R
201CH Qa A phase reactive power, Unit var(×0.1var) float 2 R
201EH Qb B phase reactive power, Unit var(×0.1var) (Invalid for three phase three wire) float 2 R
2020H Qc C phase reactive power, Unit var(×0.1var) float 2 R
202AH PFt Combined power factor(positive number: inductive,negative number:capacitive) (×0.001) float 2 R
202CH PFa A phase power factor(positive number: inductive,negative number:capacitive) (Invalid for three phase three wire) (×0.001) float 2 R
202EH PFb B phase power factor(positive number: inductive,negative number:capacitive) (Invalid for three phase three wire) (×0.001) float 2 R
2030H PFc C phase power factor(positive number: inductive,negative number:capacitive) (Invalid for three phase three wire) (×0.001) float 2 R
2044H Freq Frequency, Unit Hz(×0.01Hz) float 2 R
Energy data
101EH ImpEp (current)Total Forward active energy(kWh) float 2 R
1020H ImpEpA (current)A Forward active energy(kWh) float 2 R
1022H ImpEpB (current)B Forward active energy(kWh) float 2 R
1024H ImpEpC (current)C Forward active energy(kWh) float 2 R
1026H NetImpEp (current)Net Forward active energy(kWh) float 2 R
1028H ExpEp (current)Total Reverse active energy(kWh) float 2 R
102AH ExpEp A (current)A Reverse active energy(kWh) float 2 R
102CH ExpEp B (current)B Reverse active energy(kWh) float 2 R
102EH ExpEp C (current)C Reverse active energy(kWh) float 2 R
1030H NetExpEp (current)Net Reverse active energy(kWh) float 2 R

Sniffing

[2]

MODBUS RTU Kommunikation Chint DSU666

Geschwindgkeit: 1200 bps, 2400 bps, 4800 bps und 9600 bps Parameter (default): 9600N1 Adresse (default): 1 MODBUS RTU read command: 0x03 MODBUS RTU read command: 0x10

[3]

Tools

Eine recht gute Erlaeuterung findet sich hier, vor allem wegen der Beispiel-Frames. Wenn man erst mal den Aufbau der Frames verstanden hat ist das Abfragen der Register ein Kinderspiel.

Von diesen Tools gibt es unzaehlige. Ich probiere einfach mal durch.

MODBUSTOOL

[4]

Notebook RS485Adapter.jpg

Das Programm laesst sich leicht in Betrieb nehmen (msi Download) macht auch das was es soll hat aber noch ein paar kleine Bugs/Schoenheitsfehler.

  • Die Reiter des Registerfensters machen irgendwie was wollen.
  • Die Connect paar mit dem Adapter (siehe Foto) problemlos moeglich.
  • Der Vollstaendigkeit wegen hatte ich auf die Functions-Buttons noch die Function-Codes draufgeschrieben.
  • Die Zahl hinter dem Poll, soll wohl die Anzahl der Wiederholungen angeben.
  • Die Startadresse sollte auch in HEX moeglich sein.
  • Unglueckliches Fensterformat. Mein ServiceNotebook (Panasonic Toughbook CF-52) hat nur eine Aufloesung von 1280x800, dadurch ist der Communication Log ohne scrollen nicht sichtbar.

MODBUSTOOL Master 1.png

Beispielhaft sieht man jetzt hier das Ergebnis (3,3,1) die Abfrage (Read holding register) der Adressen 44, 46 und 47. Das sind die eingestelten Kommunikationparameter (siehe Tabelle oben).

MODBUSTOOL Master 2.png

MinimalMODBUS

[5] Dient einer Domoticz Integration und ist in Python geschrieben. Da kann ich bestimmt was uebernehmen.

Chipkin

CAS MODBUS Scanner

Auf der Seite gibt es auch ein PDF Modbus for Field Technicians zum herunterladen.

QModBus

Unsaegliches Tool! Egal was ich probiere: Not configured! Auf dem gleichen Rechner und Interface laeuft mbpoll (s. u.) schmerzfrei!

QModBus EDC Electronic Design Chemnitz GmbH

Chemnitz! Ich koennte ja jetzt boese sein.

mbpoll

Als erstes habe ich mal einen Softlink auf modbuspoll erzeugt.

Mit 

modbuspoll -v /dev/ttyUSB0 -m rtu -a 1 -r 8193 -c 2 -t 3:hex -b 9600 -d 8 -s 1 -P none

konnte ich problemlos den aktuellen Spannungswert von L1 abrufen. 

localhost:~ # modbuspoll -v /dev/ttyUSB0 -m rtu -a 1 -r 8193 -c 2 -t 3:hex -b 9600 -d 8 -s 1 -P none
debug enabled
Set mode=rtu
iGetIntList(1)
Integer found: 1
iCount=1
iGetIntList(8193)
Integer found: 8193
iCount=1
Set number of values=2
Set function=3
Set format=hex
Set rtu baudrate=9600
Set rtu data bits=8
Set rtu stop bits=1
Set rtu parity=none
Set device=/dev/ttyUSB0
mbpoll 1.0-0 - ModBus(R) Master Simulator
Copyright (c) 2015-2023 Pascal JEAN, https://github.com/epsilonrt/mbpoll
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions; type 'mbpoll -w' for details.

Opening /dev/ttyUSB0 at 9600 bauds (N, 8, 1)
Set response timeout to 1 sec, 0 us
Protocol configuration: ModBus RTU
Slave configuration...: address = [1]
                        start reference = 8193, count = 2
Communication.........: /dev/ttyUSB0,       9600-8N1 
                        t/o 1.00 s, poll rate 1000 ms
Data type.............: 16-bit register, input register table

-- Polling slave 1... Ctrl-C to stop)
[01][04][20][00][00][02][7A][0B]
Waiting for a confirmation...
<01><04><04><45><7E><20><00><97><50>
[8193]:         0x457E
[8194]:         0x2000
-- Polling slave 1... Ctrl-C to stop)
[01][04][20][00][00][02][7A][0B]
Waiting for a confirmation...
<01><04><04><45><7E><30><00><9A><90>
[8193]:         0x457E
[8194]:         0x3000
-- Polling slave 1... Ctrl-C to stop)
[01][04][20][00][00][02][7A][0B]
Waiting for a confirmation...
<01><04><04><45><7E><20><00><97><50>
[8193]:         0x457E
[8194]:         0x2000
^C--- /dev/ttyUSB0 poll statistics ---
3 frames transmitted, 3 received, 0 errors, 0.0% frame loss

everything was closed.

Jetzt stell sich die Frage: Wie bekomme ich aus den beiden HEX-Werten (jeweils 16 BIT) einen Float-Wert nach IEEE 754? 

Big-Endian Word Order, aber Little-Endian Byte Order pro Word

Im obigen Beispiel also 0x457E3000 bzw. 0x457E2000

EMS

Energy Management System

WLAN

Protokoll-Mitschnitt der Kommunikation zur FOX Cloud

Der WLAN-Stick hat hier die IP 192.168.188.20 und die FOX Cloud 47.254.142.98. 

37	21.282294	47.254.142.98	192.168.188.20	TCP	54	[TCP Keep-Alive] 14431 → 61779 [ACK] Seq=0 Ack=146 Win=65535 Len=0
38	21.332376	192.168.188.20	47.254.142.98	TCP	60	[TCP Keep-Alive ACK] 61779 → 14431 [ACK] Seq=146 Ack=1 Win=4921 Len=0
64	36.382127	47.254.142.98	192.168.188.20	TCP	54	[TCP Keep-Alive] 14431 → 61779 [ACK] Seq=0 Ack=146 Win=65535 Len=0
65	36.434026	192.168.188.20	47.254.142.98	TLSv1.2	582	Application Data
66	36.435871	192.168.188.20	47.254.142.98	TCP	60	[TCP Keep-Alive ACK] 61779 → 14431 [ACK] Seq=674 Ack=1 Win=4921 Len=0
67	36.457205	47.254.142.98	192.168.188.20	TCP	54	14431 → 61779 [ACK] Seq=1 Ack=674 Win=65535 Len=0
68	36.598810	192.168.188.20	47.254.142.98	TLSv1.2	199	Application Data
69	36.621039	47.254.142.98	192.168.188.20	TCP	54	14431 → 61779 [ACK] Seq=1 Ack=819 Win=65535 Len=0
70	36.791730	192.168.188.20	47.254.142.98	TLSv1.2	225	Application Data
71	36.814668	47.254.142.98	192.168.188.20	TCP	54	14431 → 61779 [ACK] Seq=1 Ack=990 Win=65535 Len=0
72	37.617951	192.168.188.20	47.254.142.98	TLSv1.2	832	Application Data
73	37.641783	47.254.142.98	192.168.188.20	TCP	54	14431 → 61779 [ACK] Seq=1 Ack=1768 Win=65535 Len=0
77	38.182285	192.168.188.20	47.254.142.98	TLSv1.2	582	Application Data
78	38.205860	47.254.142.98	192.168.188.20	TCP	54	14431 → 61779 [ACK] Seq=1 Ack=2296 Win=65535 Len=0
98	49.301208	192.168.188.20	224.0.0.251	IGMPv2	60	Membership Report group 224.0.0.251
106	53.213447	47.254.142.98	192.168.188.20	TCP	54	[TCP Keep-Alive] 14431 → 61779 [ACK] Seq=0 Ack=2296 Win=65535 Len=0
107	53.281337	192.168.188.20	47.254.142.98	TCP	60	[TCP Keep-Alive ACK] 61779 → 14431 [ACK] Seq=2296 Ack=1 Win=4921 Len=0
132	68.346405	192.168.188.20	47.254.142.98	TLSv1.2	199	Application Data
133	68.369342	47.254.142.98	192.168.188.20	TCP	54	14431 → 61779 [ACK] Seq=1 Ack=2441 Win=65535 Len=0
158	83.489635	47.254.142.98	192.168.188.20	TCP	54	[TCP Keep-Alive] 14431 → 61779 [ACK] Seq=0 Ack=2441 Win=65535 Len=0
159	83.592026	192.168.188.20	47.254.142.98	TCP	60	[TCP Keep-Alive ACK] 61779 → 14431 [ACK] Seq=2441 Ack=1 Win=4921 Len=0
185	98.351076	192.168.188.20	47.254.142.98	TLSv1.2	199	Application Data
186	98.373988	47.254.142.98	192.168.188.20	TCP	54	14431 → 61779 [ACK] Seq=1 Ack=2586 Win=65535 Len=0
209	113.437997	47.254.142.98	192.168.188.20	TCP	54	[TCP Keep-Alive] 14431 → 61779 [ACK] Seq=0 Ack=2586 Win=65535 Len=0
210	113.497233	192.168.188.20	47.254.142.98	TCP	60	[TCP Keep-Alive ACK] 61779 → 14431 [ACK] Seq=2586 Ack=1 Win=4921 Len=0
237	128.346328	192.168.188.20	47.254.142.98	TLSv1.2	199	Application Data
238	128.368624	47.254.142.98	192.168.188.20	TCP	54	14431 → 61779 [ACK] Seq=1 Ack=2731 Win=65535 Len=0
261	143.390178	47.254.142.98	192.168.188.20	TCP	54	[TCP Keep-Alive] 14431 → 61779 [ACK] Seq=0 Ack=2731 Win=65535 Len=0
262	143.497762	192.168.188.20	47.254.142.98	TCP	60	[TCP Keep-Alive ACK] 61779 → 14431 [ACK] Seq=2731 Ack=1 Win=4921 Len=0
288	158.348604	192.168.188.20	47.254.142.98	TLSv1.2	199	Application Data
289	158.371481	47.254.142.98	192.168.188.20	TCP	54	14431 → 61779 [ACK] Seq=1 Ack=2876 Win=65535 Len=0
319	173.598273	47.254.142.98	192.168.188.20	TCP	54	[TCP Keep-Alive] 14431 → 61779 [ACK] Seq=0 Ack=2876 Win=65535 Len=0
320	173.704904	192.168.188.20	47.254.142.98	TCP	60	[TCP Keep-Alive ACK] 61779 → 14431 [ACK] Seq=2876 Ack=1 Win=4921 Len=0
345	188.348083	192.168.188.20	47.254.142.98	TLSv1.2	199	Application Data
346	188.370425	47.254.142.98	192.168.188.20	TCP	54	14431 → 61779 [ACK] Seq=1 Ack=3021 Win=65535 Len=0
369	203.549679	47.254.142.98	192.168.188.20	TCP	54	[TCP Keep-Alive] 14431 → 61779 [ACK] Seq=0 Ack=3021 Win=65535 Len=0
370	203.609968	192.168.188.20	47.254.142.98	TCP	60	[TCP Keep-Alive ACK] 61779 → 14431 [ACK] Seq=3021 Ack=1 Win=4921 Len=0
396	218.347071	192.168.188.20	47.254.142.98	TLSv1.2	199	Application Data
397	218.369640	47.254.142.98	192.168.188.20	TCP	54	14431 → 61779 [ACK] Seq=1 Ack=3166 Win=65535 Len=0
422	233.501986	47.254.142.98	192.168.188.20	TCP	54	[TCP Keep-Alive] 14431 → 61779 [ACK] Seq=0 Ack=3166 Win=65535 Len=0
423	233.612659	192.168.188.20	47.254.142.98	TCP	60	[TCP Keep-Alive ACK] 61779 → 14431 [ACK] Seq=3166 Ack=1 Win=4921 Len=0
448	248.348031	192.168.188.20	47.254.142.98	TLSv1.2	199	Application Data
449	248.370634	47.254.142.98	192.168.188.20	TCP	54	14431 → 61779 [ACK] Seq=1 Ack=3311 Win=65535 Len=0
472	263.457827	47.254.142.98	192.168.188.20	TCP	54	[TCP Keep-Alive] 14431 → 61779 [ACK] Seq=0 Ack=3311 Win=65535 Len=0
473	263.510344	192.168.188.20	47.254.142.98	TCP	60	[TCP Keep-Alive ACK] 61779 → 14431 [ACK] Seq=3311 Ack=1 Win=4921 Len=0
499	278.351477	192.168.188.20	47.254.142.98	TLSv1.2	199	Application Data
500	278.374621	47.254.142.98	192.168.188.20	TCP	54	14431 → 61779 [ACK] Seq=1 Ack=3456 Win=65535 Len=0eport group 224.0.0.251
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