Writing to Tag Array Element

Ignition
1

Hi All

I'm working with a PLC that has an DINT array, I can read the individual elements but I can't seem to change the value in an array member?

On the PLC, it's a array of 32 bool values and it seems to be mapped correctly in persepctive

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If I try and change it via the tag browser or via a button I get the following error:

Error writing to HMI_Cmds_0_[0]: Error_Exception: Error writing to tag '[PLC]HMI Status/HMI_Cmds/HMI_Cmds_0_': null

My OPC Path is

ns=1;s=[PLC]HMI_Cmds[0]

I've tried an array of INT and BOOL with similar effects. Is there any suggestions what the best way to do this is? The aim here is to be able to toggle these bool's which leads down to function on the PLC

S

2

Don't use an array. Make individual bit tags that point at the PLC addresses. Writes to individual boolean tags can be properly handled by the driver to make the correct PLC writes.