Siemens SINAMICS G120C Function Manual

6.8.2 Selecting and deselecting SDI when the motor is switched on
Select SDI
Function
1. The higher-level control selects the SDI safety function via a fail-safe digital input or via
PROFIsafe safe communication.
2. The inverter limits the speed to the permitted direction of rotation. When SDI is selected, if
the motor rotates in the impermissible direction, then the inverter brakes the motor down
to standstill.
3. After the delay time has expired, the inverter monitors the selected direction of rotation of
the motor.
The inverter tolerates brief motion in the monitored direction of rotation up to an adjustable
angle of rotation of the motor shaft.
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Figure 6-42 Time response of the safety function SDI (Safe direction)
Inverter signal Parameters Included in the PROFI‐
safe telegram
Can be interconnec‐
ted with
F-DI F-DO
SDI+ active r9722.12 ✓ --- ✓
SDI+ deselect r9720.12 ✓ ✓ ---
SDI- active r9722.13 ✓ --- ✓
Deselect SDI- r9720.13 ✓ ✓ ---
ON/OFF1 r0054.0 --- --- ---
Operation
6.8 Safe Direction (SDI)
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
282 Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD

Siemens SINAMICS G120C Specifications

General

Brand	Siemens
Model	SINAMICS G120C
Category	Inverter
Language	English