maybe NODE-red has no access to your usb/com port where i believe your device is connected to, You mentioned usb-rs485 adapter connected direct to meter right, you proved that your connection is right with modscan, was such setup ever worked for you with diff device before? be sure that nothing ele is using this com port while you deploy node-red flow
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Yes you are correct. I think i have issues with my node red. i will try uninstall install node red again
hi...
how about the progress? still not working? maybe i can share my modbus rtu node for your reference
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Though i have uninstalled and installed i got no success 
hi, maybe u can compare with my node setup as seen below
node-red-modbus version:
modbus-getter setup:
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nodejs version:
and with this flow json
[{"id":"582f1736.87a998","type":"modbus-getter","z":"77e78410.d9584c","name":"","showStatusActivities":true,"showErrors":true,"logIOActivities":false,"unitid":"40","dataType":"HoldingRegister","adr":"15019","quantity":"2","server":"d44638ff.6e6458","useIOFile":false,"ioFile":"","useIOForPayload":false,"x":900,"y":660,"wires":[["f1eb0b8f.50bd58"],["cfc300f2.8b8aa"]]},{"id":"e8c6b3cc.59875","type":"inject","z":"77e78410.d9584c","name":"30s","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":"1","x":730,"y":660,"wires":[["582f1736.87a998"]]},{"id":"f1eb0b8f.50bd58","type":"debug","z":"77e78410.d9584c","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":1090,"y":640,"wires":[]},{"id":"cfc300f2.8b8aa","type":"debug","z":"77e78410.d9584c","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":1090,"y":680,"wires":[]},{"id":"d44638ff.6e6458","type":"modbus-client","z":"","name":"USB1","clienttype":"serial","bufferCommands":true,"stateLogEnabled":false,"tcpHost":"127.0.0.1","tcpPort":"502","tcpType":"DEFAULT","serialPort":"/dev/ttyUSB1","serialType":"RTU-BUFFERD","serialBaudrate":"19200","serialDatabits":"8","serialStopbits":"1","serialParity":"even","serialConnectionDelay":"5","unit_id":"","commandDelay":200,"clientTimeout":300,"reconnectTimeout":5}]
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Dear Friend,
In your case you are using USB port to take external device to node red. But in my case it shows as COM13 . I have uploaded all related data above in the chat for your reference.
this is what i got with your program. Its sure there is some thing that doesnt allow me to open the com port and do this job. Can i take any advice from any node red support guy. Do you have any contact of such a guy?
can you try to read full block of registers not just 1 or 2 from i.e. power table but all ?
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