Siemens SINAMICS G220 - Page 669

Description of function
W
4#3BDUJWF
44BDUJWF
450BDUJWF
44EFTFMFDUJPO
0/0''
3FBEZGPS
TXJUDIJOHPO
"DUJPO
3FTQPOTF
.PUPS
3FTQPOTF
$POWFSUFS
4#3
5IFNPUPSDPBTUTEPXOUPB
TUBOETUJMM






U
U
U
Q
Q
Q

Q
Figure14-229 Flow diagram Safe Stop 1 with braking ramp monitoring (SS1-r)
Action Motor/converter response
① Selection of SS1
• The converter detects selection of SS1 and signals the status
"SS1 active" (r9722.1).
• The converter stops the motor along the OFF3 ramp.
• Deselecting SS1 after the time ① does not interrupt the stop‐
ping of the motor.
• The converter starts the SBR delay time p9582.
② Braking along an OFF3 ramp
with SBR monitoring
• The SBR delay time has elapsed.
• The converter starts the Safe Brake Ramp SBR.
The safe brake ramp starts with the speed value of time ①.
p9583 and p9581 de󹪝ne the gradient of the safe brake ramp
SBR.
When reaching the SBR velocity limit (p9584), monitoring of
the SBR brake ramp is deactivated. Braking continues.
③ Violation of the SBR monitor‐
ing
• The converter monitors whether the motor exceeds the set safe
brake ramp when braking.
• If the motor speed fails to follow the braking ramp, the con‐
verter signals a fault and activates STO.
Functions
14.12Safety Integrated
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB 667