The counting function enables fast counting using couplers, Control Expert screens and specialized language objects. The general operation of expert modules also known as couplers is described in the section Presentation of the Counting Module Operation BMX EHC 0200.

In order to implement the counting, it is necessary to define the physical context in which it is to be executed (rack, supply, processor, modules etc.) and to ensure the software implementation.

This second aspect is performed from the different Control Expert editors: