Neuer ioBroker-Blog online: Monatsrückblick März/April 2026

[captainchaos666]

Hallo an die Experten,
könnt ihr mich unterstützen mit einem Modbus RTU Thema. Lese seit ca 2 Jahren von einen myPV Elwa via Modbus RTU Daten aus, das hat bisher auch funktioniert. Seit zwei Tagen geht es nicht mehr und bekomme folgende Fehlermeldung: Wrong CRC for frame:

Unten im Auszug das Protokoll mit der Fehlermeldung. Bei dem Protokoll sieht man auch, dass realistische Werte gelesen werden aber nach dem einlesen die Fehlermeldung kommt

modbus.3
2022-11-25 08:29:01.609	silly	States user redis pmessage modbus.3.*/modbus.3.info.connection:{"val":false,"ack":true,"ts":1669361341606,"q":0,"from":"system.adapter.modbus.3","user":"system.user.admin","lc":1669361340603}

modbus.3
2022-11-25 08:29:01.604	debug	Cleaning up request fifo.

modbus.3
2022-11-25 08:29:01.604	debug	Clearing timeout of the current request.

modbus.3
2022-11-25 08:29:01.599	info	Disconnected from slave

modbus.3
2022-11-25 08:29:00.606	silly	States user redis pmessage modbus.3.*/modbus.3.info.connection:{"val":false,"ack":true,"ts":1669361340603,"q":0,"from":"system.adapter.modbus.3","user":"system.user.admin","lc":1669361340603}

modbus.3
2022-11-25 08:29:00.597	warn	Poll error count: 1 code: {"err":"timeout","timeout":5000}

modbus.3
2022-11-25 08:29:00.597	error	Request timed out.

modbus.3
2022-11-25 08:29:00.596	warn	Error: undefined

modbus.3
2022-11-25 08:28:59.797	error	Wrong CRC for frame: 248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133

modbus.3
2022-11-25 08:28:57.047	error	Wrong CRC for frame: 248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133,44,248,4,82,231,0,1,133

modbus.3
2022-11-25 08:28:55.594	debug	[DevID_5/holdingRegs] Poll address 1001 - 21 registers

modbus.3
2022-11-25 08:28:55.593	debug	[DevID_5] Poll start ---------------------

modbus.3
2022-11-25 08:28:54.572	silly	States user redis pmessage modbus.3.*/modbus.3.info.pollTime:{"val":84,"ack":true,"ts":1669361334555,"q":0,"from":"system.adapter.modbus.3","user":"system.user.admin","lc":1669361334555}

modbus.3
2022-11-25 08:28:54.569	silly	States user redis pmessage modbus.3.*/modbus.3.holdingRegisters.1021_Elwa_Temp_Ext:{"val":837,"ack":true,"ts":1669361334554,"q":0,"from":"system.adapter.modbus.3","user":"system.user.admin","lc":1669361334554}

modbus.3
2022-11-25 08:28:54.568	silly	States user redis pmessage modbus.3.*/modbus.3.holdingRegisters.1015_Elwa_DC_A:{"val":10,"ack":true,"ts":1669361334554,"q":0,"from":"system.adapter.modbus.3","user":"system.user.admin","lc":1669361334554}

modbus.3
2022-11-25 08:28:54.567	silly	States user redis pmessage modbus.3.*/modbus.3.holdingRegisters.1014_Elwa_DC_P:{"val":37,"ack":true,"ts":1669361334554,"q":0,"from":"system.adapter.modbus.3","user":"system.user.admin","lc":1669361334554}

Dank Euch, Gruß Alex

[smartboart]

@captainchaos666
Hi ist zwar schoin alt aber ich probier mal mein Glück... Kannst du mir mal deine Modbus Einstellungen ( Register Einträge ) zeiegen?
Ich bekomme überhaupt keine Verbindung...