If your main rack uses addresses 0-127 (slots 1-32) and you set your ER base to 128, then the first slot of the ER will start at I 128.0.
In S5, the hardware configuration is not just a project setting; it is compiled into a special Data Block called . siemens s5 hardware configuration
This rack houses the Power Supply (PS) and the Central Processing Unit (CPU). Expansion Racks (ER) and Universal Racks (UR): If your main rack uses addresses 0-127 (slots
You put a 16-output module in slot 4 (start addr 12) and a 32-output module in slot 5 (start addr 16). The module in slot 5 will use Q 16.0 to Q 19.7. But the slot 4 module reserved Q 12.0 to Q 15.7. No overlap here. The real issue happens when you manually try to use Q 15.0 (reserved by slot 4) for something else. Solution: Respect the 4-byte slot reservation. Never use "reserved" addresses. Expansion Racks (ER) and Universal Racks (UR): You