Read the input status of virtual ModbusRTU in Node Red

hikaru2001 · Post by **hikaru2001** » 06 Apr 2021, 10:42

Hello friend,

I want to read out the input words of virtual ModbusRTU Master module in Node Red. However I have no good solution. Do you have some idea? Thank you!

->Johannes<- · Post by **->Johannes<-** » 08 Apr 2021, 08:54

Hi hikaru,

have look at Help Read Data Gateway Profinet Please!

At the last post you should replace "RevPiLED" with your word variable, e.g. "Input_Word_1"

Best regards
Johannes

hikaru2001 · Post by **hikaru2001** » 09 Apr 2021, 04:33

Hi Johannes,

Thank you!
Your method works, but the return type is string in Node-red. Additionally I use function node(msg.payload = Number(msg.payload); return msg;) to convert the string value into number value, then the value can be calculated later.

Post by **jgerlach-erminas** » 13 Apr 2021, 10:18

Hello hikaru,

custom/manual return types is a already feature request, you can follow future progress here https://github.com/erminas/node-red-con ... /issues/13

Greetings,
Jonas