6.7 Safe Speed Monitor (SSM)
6.7.1 Overview
What can you find in this Chapter?
The relevant operating cases for the SSM function are described in this chapter.
Table 6-7 Response of the SSM function when the motor is switched on (ON/OFF1 = 1)
Feedback signal The SSM function signals as to whether the motor speed is above or below the set
SSM limit value.
Selecting SSM when the motor is switched on (Page 273)
Table 6-8 Switching the motor on and off when SSM is active or not active
Switching on the motor (ON/OFF1 =
0 → 1)
Switching off the motor (ON/OFF1,
OFF2 or OFF3 = 1 → 0)
SSM is not active If SSM is not active, then there are no restrictions for switching on and switching
off the motor.
SSM is active If SSM is active, you must take into ac‐
count several special issues when
switching on the motor.
Switching on the motor when
SSM is active (Page 278).
The drive response depends on the sig‐
nal that you use to switch off the motor.
Switching off the motor when
SSM is active (Page 274)
Operation
6.7 Safe Speed Monitor (SSM)
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
272 Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD
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