SBC time to zero speed: When time C has elapsed from the start of the counter (step 3b,
activation of the STO and SBC functions), the user can push the reset button. This is a user-
defined value (parameter SBC.13 SBC time to zero speed).
C
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 FSO module starts a counter for
the SBC time to zero speed (C). The motor coasts to a stop.
4. b) The user releases the emergency stop button.
5. b) Time C has elapsed. The emergency stop indication lamp comes on. The user can
push the reset button (that is, acknowledgement of the STO function is possible).
6. b) The user pushes the reset button (this resets the emergency stop circuit and
acknowledges the STO function).
7. b) The FSO module deactivates the STO function in the drive and closes the main
contactor/breaker. The emergency stop indication lamp goes off. The user must reset
the drive before it is ready for a restart (this is because the FSO module generates a
fault to the drive after a limit hit [parameter FSOGEN.62 STO indication safety limit]).
26 Option description
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