Address Space - Siemens SIMATIC S7-1500 Manual

Parameters/Address space

4.3 Address space

4.3 Address space
Address space of the communication module
The input addresses of the communications module total 8 bytes. The input addresses are
automatically assigned for each communications module when you specify the device
configuration in STEP 7 (TIA Portal). Output addresses are not required.
Hardware identification (not freely configurable)
The hardware identification (HW ID) is automatically assigned for each communications
module when you specify the device configuration in STEP 7 (TIA Portal).
The hardware ID is issued along with the diagnostic messages to localize the module. In
addition, the HW identification is required for S7-1500 at the communication instructions in
order to identify the communication module. For S7-300/400, the communication module is
identified by the start address of the input data.
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CM PtP RS232 BA communication module (6ES7540-1AD00-0AA0)
Manual, 01/2013, A5E03777472-01