Hallo,
nachdem ich die ersten Gehversuche mit einem Temp-Sensor durch das Forum erfolgreich durchlaufen habe, habe ich mich jetzt an den Modbus der neuen Wallbox von Heidelberg gewagt. Soweit so gut. Es fehlen mir nur noch zwei writeHoldingRegister (06) mit den Adressen 258 & 259 , die der iobroker modbus einfach nicht mag
- alles andere klappt super! Ich habe die, wie die readHoldingRegister (03) - Beispiel Adresse 261 unter "Holdingregister" hinterlegt. Ehrlich gesagt, pick ich auch nicht den Unterschied zwischen 03 & 06 - sorry! Vielleicht kann mir hier jemand helfen? Wie folgt: Modbus Registertabelle: ModBus_register_table.pdf
Eintragungen unter iobroker/modbus: 
und so sieht das Log aus (Level: silly):
modbus.0 2021-02-27 20:31:22.851 silly (16410) States user redis pmessage modbus.0.*/modbus.0.info.connection:{"val":false,"ack":true,"ts":1614454282846,"q":0,"from":"system.adapter.modbus.0","user":"system.user.admin","lc":1614454281839}
modbus.0 2021-02-27 20:31:22.844 debug (16410) Cleaning up request fifo.
modbus.0 2021-02-27 20:31:22.843 debug (16410) Clearing timeout of the current request.
modbus.0 2021-02-27 20:31:22.838 info (16410) Disconnected from slave
modbus.0 2021-02-27 20:31:21.843 silly (16410) States user redis pmessage modbus.0.*/modbus.0.info.connection:{"val":false,"ack":true,"ts":1614454281839,"q":0,"from":"system.adapter.modbus.0","user":"system.user.admin","lc":1614454281839}
modbus.0 2021-02-27 20:31:21.835 warn (16410) Poll error count: 1 code: {"err":"timeout","timeout":5000}
modbus.0 2021-02-27 20:31:21.831 error (16410) Request timed out.
modbus.0 2021-02-27 20:31:21.829 warn (16410) Error: undefined
modbus.0 2021-02-27 20:31:16.846 error (16410) unknown function code: 131
modbus.0 2021-02-27 20:31:16.834 silly (16410) States user redis pmessage modbus.0.*/modbus.0.inputRegisters.200_Support:{"val":32,"ack":true,"ts":1614454276831,"q":0,"from":"system.adapter.modbus.0","user":"system.user.admin","lc":1614450
modbus.0 2021-02-27 20:31:16.826 debug (16410) Poll holdingRegs DevID(1) address 261 - 3 bytes
modbus.0 2021-02-27 20:31:16.817 silly (16410) States user redis pmessage modbus.0.*/modbus.0.inputRegisters.101_Hardware_configuration minimal current:{"val":6,"ack":true,"ts":1614454276808,"q":0,"from":"system.adapter.modbus.0","user":"s
modbus.0 2021-02-27 20:31:16.812 silly (16410) States user redis pmessage modbus.0.*/modbus.0.inputRegisters.100_Hardware_configuration maximal current:{"val":16,"ack":true,"ts":1614454276807,"q":0,"from":"system.adapter.modbus.0","user":"
modbus.0 2021-02-27 20:31:16.802 debug (16410) Poll inputRegs DevID(1) address 200 - 1 bytes
modbus.0 2021-02-27 20:31:16.793 silly (16410) States user redis pmessage modbus.0.*/modbus.0.inputRegisters.14_Power_Summe_VA:{"val":0,"ack":true,"ts":1614454276767,"q":0,"from":"system.adapter.modbus.0","user":"system.user.admin","lc":16
modbus.0 2021-02-27 20:31:16.791 silly (16410) States user redis pmessage modbus.0.*/modbus.0.inputRegisters.12_Voltage_L3 - N rms in Volt:{"val":8,"ack":true,"ts":1614454276767,"q":0,"from":"system.adapter.modbus.0","user":"system.user.ad
modbus.0 2021-02-27 20:31:16.790 silly (16410) States user redis pmessage modbus.0.*/modbus.0.inputRegisters.11_Voltage_L2 - N rms in Volt:{"val":9,"ack":true,"ts":1614454276766,"q":0,"from":"system.adapter.modbus.0","user":"system.user.ad
modbus.0 2021-02-27 20:31:16.789 silly (16410) States user redis pmessage modbus.0.*/modbus.0.inputRegisters.10_Voltage_L1 - N rms in Volt:{"val":236,"ack":true,"ts":1614454276766,"q":0,"from":"system.adapter.modbus.0","user":"system.user.
modbus.0 2021-02-27 20:31:16.787 silly (16410) States user redis pmessage modbus.0.*/modbus.0.inputRegisters.9_Temperatur_PCB:{"val":187,"ack":true,"ts":1614454276766,"q":0,"from":"system.adapter.modbus.0","user":"system.user.admin","lc":1
modbus.0 2021-02-27 20:31:16.778 silly (16410) States user redis pmessage modbus.0.*/modbus.0.inputRegisters.8_L3_- Current RMS:{"val":0,"ack":true,"ts":1614454276765,"q":0,"from":"system.adapter.modbus.0","user":"system.user.admin","lc":1
modbus.0 2021-02-27 20:31:16.777 silly (16410) States user redis pmessage modbus.0.*/modbus.0.inputRegisters.7_L2_- Current RMS:{"val":0,"ack":true,"ts":1614454276765,"q":0,"from":"system.adapter.modbus.0","user":"system.user.admin","lc":1
modbus.0 2021-02-27 20:31:16.775 silly (16410) States user redis pmessage modbus.0.*/modbus.0.inputRegisters.6_L1_- Current RMS:{"val":0,"ack":true,"ts":1614454276765,"q":0,"from":"system.adapter.modbus.0","user":"system.user.admin","lc":1
modbus.0 2021-02-27 20:31:16.774 silly (16410) States user redis pmessage modbus.0.*/modbus.0.inputRegisters.5_Charging_State:{"val":10,"ack":true,"ts":1614454276764,"q":0,"from":"system.adapter.modbus.0","user":"system.user.admin","lc":16
modbus.0 2021-02-27 20:31:16.772 silly (16410) States user redis pmessage modbus.0.*/modbus.0.inputRegisters.4_Modbus_Register Version:{"val":263,"ack":true,"ts":1614454276764,"q":0,"from":"system.adapter.modbus.0","user":"system.user.admi
modbus.0 2021-02-27 20:31:16.758 debug (16410) Poll inputRegs DevID(1) address 100 - 2 bytes
modbus.0 2021-02-27 20:31:16.740 silly
Vielen Dank schon mal 
Grüße
Till