M172 ESME timed task configuration.

[BDPiciu]

Is there a way to set the Timed task period in the program/project  and not in the Task Configuration window. 

The problem I have is that the time I set reverts back to 100ms whenever I make changes or save the project under a different name etc. Is there a variable or option to fix the value I set such that it does not revert back to 100.

The systsk target variables all appear to be read only.

[ismailozinan]

Hi,

In general, defining the task period based on a variable is not recommended, as it may introduce timing variations (jitter). This can affect time-dependent functions such as PID control, which is commonly used in HVAC applications.

  For reliable and stable operation, the task period is typically configured in the PLC Task Configuration rather than being controlled by program variables. This approach ensures consistent execution timing and helps maintain overall system stability.Therefore there is no spesific task time register.

BR

[FedericoM · Accepted solution]

Hello,

I've tested what you reported with Ecostruxure Machine Expert HVAC 1.9, but I can't replicate it.

Could you please test it with this version or give me more details about how to replicate it?

By the way this is the only way to set the period of Timed task.