How to update the RTC of the HMIST6 using a M172

Software

EcoStruxure Operator Terminal Expert V3.1 SP1

Product Line

Harmony HMIST6
Modicon M172P

Explanation

The Modicon M172P has a defined memory space for the time management in the folder "System Clock Values".
The variables from %MW8736 up to %MW8743 are for reading the actual date and time of the controller and the variables from %MW8744 up to %MW8751 are to setting the date and time.
The variable "sysClockSet_Upload" in the M172 allows us to update the RTC in the controller when we have configured the variables %MW8744 to %MW8750.
Those variables must be link to our Harmony HMI in the EcoStruxure Operator Terminal Expert, in a global script we can write the Date and time of our HMI using the actual values of the PLC.
The example is attached in this FAQ.



Note:
In September 2024 the software EcoStruxure Operator Terminal Expert v3.4.1 was released. It can be downloaded from our website or via the Schneider Electric Software Update.

Released for:Schneider Electric UK