# Monitor PLC Command with Return - Gateway timer?

**URL:** <https://forum.inductiveautomation.com/t/monitor-plc-command-with-return-gateway-timer/8909>\
**Category:** Ignition\
**Created:** [August 15, 2014, 6:39am UTC](https://forum.inductiveautomation.com/t/monitor-plc-command-with-return-gateway-timer/8909 "2014-08-15T06:39:33Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mazeyrat](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mazeyrat/32/10955_2.png) [@mazeyrat](https://forum.inductiveautomation.com/u/mazeyrat)\
**Post date:** [August 15, 2014, 6:39am UTC](https://forum.inductiveautomation.com/t/monitor-plc-command-with-return-gateway-timer/8909/1 "2014-08-15T06:39:33Z")

</div>

I need to manage a monitoring of command.

Command are integer sqltag send to the PLC.  
The PLC copy the value of the command into a Retrun Tag.

In ignition, I need to compare Return and Command and trigger an alarm if there are different after a timeout.

would like to use tag event script feature, but I need to monitor a timeout condition, if non return is send by PLC ![:scratch:](https://us1.discourse-cdn.com/inductiveautomation/original/1X/76d1620bec252bfac07050c889ff5a91dc8a9c25.gif ":scratch:")

Any idea to make timer (gateway timer, no client timer)