Technical data

Basic functions
4.2 Homing
Connection of the SINAMICS S120 to the Technology CPU
112 Product Information, 09/2011, A5E00480378-04
Inverting the selected digital input of the SINAMICS
A general condition in conjunction with SINAMICS governs the homing only with an external
zero mark. Only negative edges are permitted for the positive travel direction and only
positive edges are permitted for the negative travel direction, this means that the same cam
side is always used. This means that your construction circumstances may require that the
BERO signal needs to be inverted.
To invert the Bero signal, switch in the S7T Config project navigator to the dialog box:
"\Technology\SINAMICS_S120\Control_Unit. Mark the "Control_Unit" entry and select
Expert list in the shortcut menu in order to open the expert list. Parameter "p490.9 DI/DO 9
(X122.8)" allows you to invert the digital input DI/DO 9.
A separate parameter is provided for inverting each digital input that can be used to fetch the
external zero mark. The following table contains the correct parameters for the selected
digital input:
P490.9 DI/DO 9 X122.8
P490.10 DI/DO 10 X122.10
P490.11 DI/DO 11 X122.11
P490.13 DI/DO 13 X132.8
P490.14 DI/DO 14 X132.10
P490.15 DI/DO 15 X132.11
This completes the assignment of the internal digital input of the CU320 to the equivalent
zero mark signal in the SINAMICS.