Siemens Automation System S7-400 - Manual (Page 57)

Addressing the S7-400
3-5
Automation System S7-400 Hardware and Installation
A5E00850741-01
Default Addresses of Analog Modules
On the S7-400, the default addresses for analog modules start from 512 (first slot
in the central rack which is usually occupied by the power supply module) up to
1600.
The algorithm used to calculate the default address of an analog module is:
Default address = (slot number - 1) x 64 + 512
Example
The default address of an analog module in the 6th slot is as follows:
Default address = (6 - 1) x 64 + 512 = 832