Siemens SIMATIC S7-300 Product Information page 111

Assignment of the equivalent zero mark signal to the digital input of the SINAMICS
For homing to an external zero mark with axes on the PROFIBUS, the external zero mark
must be configured as digital input on the drive. This requires that the configuration of the
drive specifies which internal digital input of the CU320 is to be used to fetch the equivalent
zero mark signal.
Only the fast digital inputs can be used as internal digital inputs of the CU320 for fetching the
equivalent zero mark signal:
DI/DO 9
DI/DO 10
DI/DO 11
DI/DO 13
DI/DO 14
DI/DO 15
To parameterize the CU 320 input for fetching the equivalent zero mark signal, switch in the
S7T Config project navigator to the appropriate drive. In the example shown here, to the
dialog box: "\Technology\SINAMICS_S120\Drives\SERVO_02. Start the expert list with a
right mouse click on the drive and selecting Expert > Expert List in the submenu. Select the
"p495 [0] equivalent zero mark input terminal encoder 1" parameter in the expert list and
interconnect the parameter with the DI/DO 9 (X122.8) (1) input.
A different equivalent encoder can also be selected for the assignment of the zero mark
input.
P495[0]
P495[1]
P495[2]
Connection of the SINAMICS S120 to the Technology CPU
Product Information, 09/2011, A5E00480378-04
X122.8
X122.10
X122.11
X132.8
X132.10
X132.11
Encoder 1
Encoder 2
Encoder 3
Basic functions
4.2 Homing
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