Hi Node Red community,
I'm trying to read some values of the energy meter (Float32) in Node-Red. Interestingly, I can read some accurate values, but they are also some of the values for which I receive "NaN".
The configuration consists of a Schneider A9MEM3350 energy meter with a RS485 serial interface, a Modbus TCP gateway and Node Red running on a Raspberry Pi 3.
Initially I had used an Arduino with RS485 transciever to read the values, with exactly the same result. In the following lines I attach some pictures and Node Red example flow, maybe someone can help me figure out what is wrong.
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\nreturn msg;","outputs":1,"noerr":0,"x":370,"y":40,"wires":[["26a18739.d0a098"]]},{"id":"1b9bebc8.6b6614","type":"modbus-flex-getter","z":"1faa546d.dcd77c","name":"I2: phase 2 current","showStatusActivities":true,"showErrors":false,"server":"675fd2c6.3dfa3c","useIOFile":false,"ioFile":"","useIOForPayload":false,"x":610,"y":80,"wires":[[],["c3177dab.69072"]]},{"id":"a38d5c4c.fbe27","type":"modbus-flex-getter","z":"1faa546d.dcd77c","name":"I3: phase 3 current","showStatusActivities":true,"showErrors":false,"server":"675fd2c6.3dfa3c","useIOFile":false,"ioFile":"","useIOForPayload":false,"x":610,"y":120,"wires":[[],["751f4017.88405"]]},{"id":"af608401.50f618","type":"modbus-flex-getter","z":"1faa546d.dcd77c","name":"Current Avg","showStatusActivities":true,"showErrors":false,"server":"675fd2c6.3dfa3c","useIOFile":false,"ioFile":"","useIOForPayload":false,"x":590,"y":160,"wires":[[],["68fb9ce2.83d234","12fadbc5.393184"]]},{"id":"e8bb19f5.9a5a98","type":"function","z":"1faa546d.dcd77c","name":"FC3 - I2: phase 2 current","func":"msg.payload = {\n 'fc': 3, \n 'unitid': 2, \n 'address': 3004, \n 'quantity': 2 \n}; \nreturn msg;","outputs":1,"noerr":0,"x":370,"y":120,"wires":[["a38d5c4c.fbe27"]]},{"id":"bb9fa83f.baf8d8","type":"function","z":"1faa546d.dcd77c","name":"FC3 - Current Avg","func":"msg.payload = {\n 'fc': 3, \n 'unitid': 2, \n 'address': 3010, \n 'quantity': 2 \n}; \nreturn msg;","outputs":1,"noerr":0,"x":350,"y":160,"wires":[["af608401.50f618"]]},{"id":"e9cd218c.1680b","type":"inject","z":"1faa546d.dcd77c","name":"1 sec","topic":"","payload":"","payloadType":"str","repeat":"1","crontab":"","once":false,"onceDelay":0.1,"x":110,"y":100,"wires":[["c058e06d.a3159","788a1b70.8a44a4","e8bb19f5.9a5a98","bb9fa83f.baf8d8"]]},{"id":"b61745c4.fa9eb8","type":"modbus-response","z":"1faa546d.dcd77c","name":"","registerShowMax":20,"x":970,"y":240,"wires":[]},{"id":"4bd66b40.ec2424","type":"modbus-response","z":"1faa546d.dcd77c","name":"","registerShowMax":20,"x":1250,"y":240,"wires":[]},{"id":"a00fa66b.b7a5d8","type":"modbus-response","z":"1faa546d.dcd77c","name":"","registerShowMax":20,"x":1250,"y":280,"wires":[]},{"id":"32401ab7.44bee6","type":"modbus-response","z":"1faa546d.dcd77c","name":"","registerShowMax":20,"x":1250,"y":320,"wires":[]},{"id":"fbce3164.ebb78","type":"ui_group","z":"","name":"Current","tab":"8e5db1d7.c63a7","order":1,"disp":true,"width":"6","collapse":false},{"id":"675fd2c6.3dfa3c","type":"modbus-client","z":"","name":"iEM3350","clienttype":"tcp","bufferCommands":true,"stateLogEnabled":false,"tcpHost":"192.168.1.1","tcpPort":"10502","tcpType":"DEFAULT","serialPort":"/dev/ttyUSB","serialType":"RTU-BUFFERD","serialBaudrate":"9600","serialDatabits":"8","serialStopbits":"1","serialParity":"none","serialConnectionDelay":"100","unit_id":"2","commandDelay":"1","clientTimeout":"1000","reconnectTimeout":"2000"},{"id":"8e5db1d7.c63a7","type":"ui_tab","z":"","name":"Power meter","icon":"dashboard","order":3}]
