Deactivate channel of 750-463 module with codesys 3.5

CODESYS
1

I’m using the basic controller 100 with a lot of 750-463 (4-channel analog input for Pt1000) modules and also one 750-496 (8-channel analog input 4…20 mA).
I have just noticed that I can deactivate unused channels on the 496 module with
WagoTypesModule_75x_496.eSignalType.CHANNEL_DISABLED

Is there a way to also disable channels with the 463-module? A similar channel_disabled parameter is missing there (at least in the docs). You can just change the temperature sensor type.
It would be great if the red LEDs would go out and the controller would not display an I/O error (unless there is an error) :slightly_smiling_face:

2

The 750-463 doesn’t have the channel disable option, but the 750-451 does and it’s 8-channel so it helps you save space as well.

3

Please note also that the resistive or temperature probes connected to the 750-463 or 750-464 module are measured sequentially (channel 1, channel 3, channel 2 then channel 4). Thus, channels 1 and 3 as well as channels 2 and 4 form a common measurement circuit. In 4 channel mode, both channels of the measuring circuit must therefore be connected or short-circuited.
image

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4

Thanks for the answer. I have already taken it into account.
So I can also just connect the unused channels with a resistor? I assume that if I do so the controller will just output fake numbers but the red LEDs will turn off?

5

Yes, just use a resistor within the temperature range.
For instance in PT1000 mode, with a 1k resistor you should see 0°C

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