Siemens S7/TIA v16: Is there a way to disable all the used AI channels on an SM 1231?

[Mas01]

As above.
I've been fishing around on TIA portal but haven't found a "Disable channel" tickbox.
Is there one? If so, where is it?
Cheers

 

[Mas01]

EDIT: I meant UNUSED in the title!

 

[JesperMP]

I don't know on SM1231, but on the AI modules I use, I can select the measurement type for each channel, and I can chose from 'Current (4-wire transducer)', 'Current (2-wire transducer)' and 'Deactivated'.

 

[Mas01]

I don't know on SM1231, but on the AI modules I use, I can select the measurement type for each channel, and I can chose from 'Current (4-wire transducer)', 'Current (2-wire transducer)' and 'Deactivated'.

Cheers Jesper.
I've got a feeling this is not possible on SM1231...I would have thought it would be reasonably obvious (even for me) where the 'disable channel' option would be.

 

[parky]

There is no real reason for disabling a channel just don't use it, some like RTD cards it is recomended that unused channels are shorted or linked (Siemens S5 was one where it caused problems).

 

[Mas01]

There is no real reason for disabling a channel just don't use it, some like RTD cards it is recomended that unused channels are shorted or linked (Siemens S5 was one where it caused problems).

Cheers for this, I was thinking with my Mitsubishi hat on, where I saw commands in the ANALOGUES window where channels were enabled/disabled. End of the day, I don't suppose it matters.

 

[chud]

If its a mA analog input card wont there be system errors if the channels aren't deactivated and they are not wired?

 

[cardosocea]

Cheers for this, I was thinking with my Mitsubishi hat on, where I saw commands in the ANALOGUES window where channels were enabled/disabled. End of the day, I don't suppose it matters.

I believe this isn't a thing in Siemens world as you'd need to download the new hardware configuration whenever you enabled/disabled the channel. Not entirely sure how it goes on TIA Portal, but it was the case on Step7.

If its a mA analog input card wont there be system errors if the channels aren't deactivated and they are not wired?

In many applications I've seen channels wired in series to avoid this.

 

[Mas01]

If its a mA analog input card wont there be system errors if the channels aren't deactivated and they are not wired?

I'm no expert, but I think you can UNTICK the boxes called

• "Enable broken wire diagnostics" and
• "Enable overflow diagnostics"

for the channels that are not used. That should suppress any errors associated with those channels.

 

[chud]

I'm no expert, but I think you can UNTICK the boxes called

• "Enable broken wire diagnostics" and
• "Enable overflow diagnostics"

for the channels that are not used. That should suppress any errors associated with those channels.

Yes thats why i stated this. And correct. But as Cardosocea stated that a download is necessary which will stop the plc. So the correct way is to do as he stated