node-red-contrib-modbus: Using Modbus Flex Connector returns FSM Reset On State {"value":"failed","actions":[],"changed":true}

Problem

• ( ) bug report => please search github for a similar issue or PR and test Modbus problems with the modbus-serial package before submitting
• ( x ) unexpected behavior => please visit the Wiki before

Current behavior

Using ‘Modbus Flex Connector’ and ‘Modbus Flex Getter’ returns warning: FSM Reset On State {"value":"failed","actions":[],"changed":true}. The injected Payload to ‘Modbus Flex Getter’ is:

msg.payload = {
    'value':msg.payload,
    'fc': 3,
    'unitid': 1,
    'address': 24 ,
    'quantity': 1
};
return msg;

What does the warning mean? Is it serious?

I do not get any Modbus output.

Expected behavior

No warning.

Minimal reproduction of the problem with instructions

1. Connect Inject, function Node and Modbus Flex Connector
2. Connect Inject, function Node and Modbus Flex Getter
3. Inject to Modbus Flex Connector, then to Modbus Flex Getter

Demo Flow:

[{"id":"3ba35010.8a2fa","type":"tab","label":"Flow 1","disabled":false,"info":""},{"id":"e6b7f53e.5d7b18","type":"modbus-flex-connector","z":"3ba35010.8a2fa","name":"","maxReconnectsPerMinute":4,"emptyQueue":false,"showStatusActivities":false,"showErrors":true,"server":"ebc49841.242f08","x":570,"y":120,"wires":[]},{"id":"e09e1c56.55e1c8","type":"function","z":"3ba35010.8a2fa","name":"","func":"msg.payload = {\n    'connectorType': 'TCP',\n    'tcpHost': '10.0.0.81',\n    'tcpPort': '502',\n    'unitId': 2\n};\nreturn msg;","outputs":1,"noerr":0,"x":380,"y":120,"wires":[["e6b7f53e.5d7b18"]]},{"id":"1faf2d77.4fb13b","type":"inject","z":"3ba35010.8a2fa","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":240,"y":120,"wires":[["e09e1c56.55e1c8"]]},{"id":"5945e4a3.b9208c","type":"inject","z":"3ba35010.8a2fa","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":260,"y":180,"wires":[["8fe16f06.445b88"]]},{"id":"8fe16f06.445b88","type":"function","z":"3ba35010.8a2fa","name":"","func":"msg.payload = {\n    'value':msg.payload,\n    'fc': 3,\n    'unitid': 1,\n    'address': 24 ,\n    'quantity': 1\n};\nreturn msg;","outputs":1,"noerr":0,"x":410,"y":180,"wires":[["c8c340d5.7666d8"]]},{"id":"c8c340d5.7666d8","type":"modbus-flex-getter","z":"3ba35010.8a2fa","name":"","showStatusActivities":false,"showErrors":false,"logIOActivities":false,"server":"ebc49841.242f08","useIOFile":false,"ioFile":"","useIOForPayload":false,"x":590,"y":180,"wires":[[],["b3c606f1.ac3178"]]},{"id":"b3c606f1.ac3178","type":"debug","z":"3ba35010.8a2fa","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":770,"y":200,"wires":[]},{"id":"ebc49841.242f08","type":"modbus-client","z":"","name":"Test","clienttype":"tcp","bufferCommands":false,"stateLogEnabled":false,"tcpHost":"10.0.0.254","tcpPort":"20502","tcpType":"DEFAULT","serialPort":"/dev/ttyUSB","serialType":"RTU-BUFFERD","serialBaudrate":"9600","serialDatabits":"8","serialStopbits":"1","serialParity":"none","serialConnectionDelay":"100","unit_id":"1","commandDelay":"1","clientTimeout":"1000","reconnectOnTimeout":false,"reconnectTimeout":"2000","parallelUnitIdsAllowed":false}]

Your Environment

Please tell us about your environment:

• ( x ) I am using just the Node-RED package and got modbus-serial package installed with it

• Device :

  • ( x ) Node-RED Docker Image v 1.0.2

• Description of the connecting Modbus system:

  • Name : Acromag 967/8 EN

• node-red-contrib-modbus version: v5.2.0

• Node: (min. 10.x) node --version = v10.16.3