Send DATA to S7-1200 Problem

General
1

Hi

I am new with Node-RED :wink: i am trying to send data from Shelly plug to s7-1200 PLC but i keep getting “Data for item of type 'INT' must be a number” error.

I have Debug in parallel where the data gets to as a number. Whey do i get the error when on the S7 out node?

number
number1614×348 20.6 KB

2

Welcome to the forums @kaan86

You will need to specify the exact name(s) (or link) to the shelly node you're using, the potential person to provide the answer, may not use shelly at all - but with knowing your full setup, may be able to to identify the issue - maybe provide a link to the node, so the community can review the Node.

A screenshot does nothing :smiley:

3

Or if the problem is when writing to the plc then tell us which node you are using for that.

4

Can this help? I link the input to payload.switch0.freq from the shelly…

And the connection to the PLC works i can change the value of i tried with a inject node it works..

2025-08-30 21_00_27-Greenshot
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2025-08-30 21_01_05-Greenshot
2025-08-30 21_01_05-Greenshot553×230 5.34 KB

5

If i works with 10 in msg.payload then insert a Change node configured to Move msg.payload.switch0.freq To msg.payload. Check in a debug node that then the required number appears in msg.payload and then feed that to the S7 node.

6

That did the job. Thanks