iec870 driver does not transfer to SE new values of command variables if the old value had status bit OFF

iec870 driver does not transfer to SE new values of command variables if the old value had status bit OFF

Summary

The IEC 870 driver does not update values of command variables in the Service Engine if old variable values have status bit OFF. This behavior has been modified.

Description

The IEC 870 driver does not update the values of the command variables after driver stop and start commands via zenon driver functions. The command variables of type ID T45..T64 keep the status bit OFF and their old value. With 'Write set value" the driver sends the command to the PLC, but there is no update in the Service Engine, neither when driver sends command nor receives command acknowledgement from PLC.

 

Therefore it is no longer possible to process commands via Command Processing. The user must restart the Service Engine to continue processing commands. This error has been introduced with build 116045 for zenon 11 and 12.

 

This error has been fixed. The IEC 870 driver now updates the current values and status bits in the Service Engine again.

 

To benefit from this fix:

  • Update your zenon Software Platform to the latest build of zenon 11 or higher.




Item ID: 264582
Version: 11.00 Build: 157700

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