3. a) The motor speed reaches the zero speed limit (B). The FSO module activates the
drive STO and SBC functions (this opens the main contactor/breaker) and stops the
ramp monitoring. The emergency stop indication lamp comes on. The user can push
the reset button, that is, the acknowledgment of the STO function is possible.
Note: You can set an additional delay for the STO and SBC activation (parameter
SS1.15 SS1-r ramp zero speed delay for STO).
4. a) The user releases the emergency stop button.
5. a) The user pushes the reset button (this resets the emergency stop circuit and
acknowledges the STO function).
6. a) The FSO module deactivates the STO function in the drive and closes the main
contactor/breaker. The emergency stop indication lamp goes off. The drive is ready for
a restart.
Case B: The motor speed does not follow the user-defined stop ramp monitoring window
Time
Motor speed
1
2 6b 7b
E-stop button
(SS1 request)
Drive STO
status
Reset button
B
3b
A
4b
Indication lamp
5b
Contactor
(SBC output)
Safety function response time.A
Zero speed limit: Speed limit for activating the STO and SBC functions. Activation of the SBC
function opens the main contactor/breaker. This is a user-defined value (parameter FSOGEN.52
Zero speed with encoder).
B
1. The user pushes the emergency stop button (this activates the SS1 function of the FSO
module).
2. The drive starts to decelerate the motor along the user-defined stop ramp. The FSO
module starts the ramp monitoring (SAR1 parameters 200.112, SARx.21, SARx.22 and
SARx.02).
3. b) The FSO module activates the drive STO and SBC functions, opens the main
contactor/breaker and stops the ramp monitoring. The motor coasts to a stop.
4. b) The user releases the emergency stop button.
Option description 31
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