Siemens SIMATIC S7-300 Product Information page 107

Setting of the integrated inputs in the Technology CPU
In the example shown here, the digital inputs integrated in the Technology CPU are to be
used to fetch the homing output cam (BERO). The hardware address of these integrated
inputs are required for the settings of the homing mode in the technology.
You set these during the configuration of the Technology CPU in HW Config.
In the shown example, the hardware address of the first integrated digital input is
byte 66 and bit 0.
Connection of the SINAMICS S120 to the Technology CPU
Product Information, 09/2011, A5E00480378-04
Basic functions
4.2 Homing
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