I'm getting a bunch of numbers via Modbus TCP and am looking to rebroadcast those numbers via a node-red Modbus server, as below. However, I keep getting "Is Not A Valid Memory Write Message To Server" in the debug log on inputting these numbers. Related to this issue . Also for some reason the paylo…

[image] Darren: Seems to be the fireout node You have this code in that function msg.payload = msg.payload[0]/1; msg.payload = { 'value': msg.payload[0], The first line sets msg.payload to whatever is in msg.payload[0], though I don't know why you are dividing it by 1. After that line is e…

[image] Darren: Related to this issue . Your link does not work.

The original titular error message has now mysteriously disappeared with flow tidying my end; I suspect it may have been some malfunctioning experiment's output. Now I'm getting a different error message: "TypeError: Cannot read properties of undefined (reading 'length')" Can anyone help?

Which node is throwing that error?

[image] Darren: "TypeError: Cannot read properties of undefined (reading 'length')" Seems to be the fireout node, which is giving value: undefined. Not sure why, as it's setup more or less the same as the other nodes. It will give different values depending on the power state, System Stopped/…

That seems to have fixed it; thank you so much! The division by 1 is a mysterious artifact inherited from legacy code; your archaeology skills are much better than mine, and your interpretation makes sense as well as banishing the error I was having.

By the way, in javascript, if object properties do not contain special characters such as - or space then you don't need to include them in quotes, so you could save a bit of typing and use msg.payload = {value: Number(msg.payload[0]), register: 'holding', address: 1, disableMsgOutput: 0 }; I…

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"Is Not A Valid Memory Write Message To Server"

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Darren 27 April 2023 11:55 3

Oops, sorry - I must have copied it wrong: Questions about Modbus - UI controls and forwarding signals?

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"Is Not A Valid Memory Write Message To Server"

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