ABB AC500 Introduction Manual page 107

In the appearing window, leave the "Board No. 1" unchanged (counting mode: CPU-internal coupler =
Board No. 0, first coupler left of the CPU = Board No. 1, second coupler = Board No. 2).
Click on "Accept". The coupler is now connected to the CPU.
Recommendation: You can choose the symbolic coupler name according to your plant (mark coupler
with left mouse button; the coupler is displayed with a blue rectangle; press right mouse button ->
symbolic name. Example for symbolic name: DPM1_AC500).
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Introduction to AC500 1-105
AC500 / Issued: 07.2006