Address Space Of The Digital On-Board I/O - Siemens Simatic S7-1500 Manual

5.2

Address space of the digital on-board I/O

Address space of digital input and digital output channels
The addresses are divided into 2 x 16 digital input channels and 2 x 16 digital output
channels. STEP 7 (TIA Portal) assigns the addresses automatically. You can change the
addresses in the hardware configuration of STEP 7 (TIA Portal), i.e. freely assign the start
address. The addresses of the channels are based on the start address.
The letters "a" to "d" are lasered on the on-board I/O. "IB a", for example, stands for start
address input byte a. "QB x", for example, stands for start address output byte x.
Figure 5-2
CPU 1512C-1 PN (6ES7512-1CK00-0AB0)
Manual, 09/2016, A5E35306440-AB
Address space of the submodule X11 of the 2 x 32-channel digital on-board I/O (16
digital inputs/16 digital outputs) with value status
Parameters/address space
5.2 Address space of the digital on-board I/O
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