OPC write back (SQL tags)

Ignition
1

Hi All,

I’m not able to write to some OPC tags which are in read/write mode using the OPC write back option on a SQL tag but I’m able to write values using system.opc.writeValue() function though. Does anyone know what could be missing? These write-back options used to work before though, we recently upgraded ignition to 7.9.18 from 7.9.14 so I’m not sure if it has anything to do with it.

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TIA

Sam

2

You might need a cast in SQL to the nearest datatype matching that OPC item.