When using Ecostruxure Operator Terminal Expert to program HMISTO panel, why are retained variables not being retained when power is cycled?


16 March 2022

There is a limitation for HMISTO retentive variables. 

A proper Shutdown is required for backing up variable retentive data.

info from help files

If we just remove the power, all retentive variable values will be lost. 

There are 2 possibilities for shutdown.

 Displaying the hardware configuration and selecting shutdown or create.

 Or create a Shutdown switch on the panel and associate a script to shutdown the runtime.

script for doing shutdown