Hierarchical control interlocking

Hierarchical control interlocking

Hi
Could you give me a suggestion about Process Gateway?
I have 02 dispatching centre connected to the system via IE101 process gateway and I want to make a hierarchical control interlock between its. I have 03 button control 03 internal variables (HMI, OCC1, OCC2) to enable control from 1 of its.
I can block control from HMI when I choose OCC1, OCC2 but I can not block command 101 from OCC1, OCC2 when I choose HMI
Please give me your idea
Brgds

This is a migrated post! Originally posted on 20.06.2016 by user skywalker. Please be aware that information can be outdated.