Siemens CU240B-2 Function Manual

6.5.2.2 Extended function SS1 with acceleration monitoring
Select SS1
Function
1. The higher-level control selects the SS1 safety function via a fail-safe digital input or via
PROFIsafe safe communication.
2. If the motor has already been switched off when selecting SS1, then the inverter safely
switches off the motor torque with the safety function STO.
If the motor is switched on when SS1 is selected, the inverter brakes the motor with the
OFF3 ramp-down time. The inverter monitors whether the load speed decreases using the
SBR function.
3. The inverter safely switches off the motor torque using the STO safety function if the load
speed reaches the "standstill monitoring".
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Figure 6-18 Braking behavior and diagnostics of the safety function SS1 (Safe Stop 1)
Inverter signal Parameter Included in the PROFI‐
safe telegram
Can be interconnec‐
ted with
F-DI F-DO
STO active (extended functions) r9722.0 ✓ --- ✓
SS1 active (extended functions) r9722.1 ✓ --- ✓
Deselect SS1 (extended functions) r9720.1 ✓ ✓ ---
SAM/SBR active r9723.16 --- --- ---
Operation
6.5 Safe Stop 1 (SS1)
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
240 Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD

Siemens CU240B-2 Specifications

General

Brand	Siemens
Model	CU240B-2
Category	Inverter
Language	English