momentary setting a digital tag

Unfortunately, the built-in functions like Pulse do not guarantee writes.

There was previously discussion about it here as part of this question.

(8) SA Faceplate - Use of Pulse Function - AVEVA︎ Plant SCADA - Heroes HQ: HMI / SCADA Technical Community - AVEVA Software Community

It's true that Pulse is not the most bulletproof method to guarantee that both parts of the toggle will occur, but in reality I've used it numerous times in ControlLogix and CompactLogix systems with Citect SCADA with very little problem.  I can't explain why it's not working for Charles here because it definitely should.   

It's true that Pulse is not the most bulletproof method to guarantee that both parts of the toggle will occur, but in reality I've used it numerous times in ControlLogix and CompactLogix systems with Citect SCADA with very little problem.  I can't explain why it's not working for Charles here because it definitely should.