Emergency Stop, Stop Category 1 With Time Monitoring - ABB ACS880-07 User Manual

Emergency stop, stop category 1 with time monitoring

This time scheme diagram illustrates the operation of the Emergency stop, stop category
1 safety function with time monitoring. This option uses the Safe stop 1 (SS1) function of
the FSO module.
Case A: The motor speed reaches the zero speed limit within the user-defined time
Motor speed
SS1.14
A
C
B
1 2
A SS1-t monitoring time: When time A has elapsed, the FSO module activates STO function.
B Zero speed limit: Speed limit for activating the drive STO function. This is a user-defined value
(parameter FSOGEN.51 Zero speed without encoder).
C Safety function response time.
1. The user pushes the emergency stop button (this activates the SS1 function of the FSO
module). The FSO module starts a timer for delay A.
2. The drive starts to decelerate the motor along the user-defined stop ramp (SAR1
parameter 200.112 SAR1 ramp time to zero).
3. a) The motor speed goes below the zero speed limit (B). The FSO module activates the
drive STO function. The emergency stop indication lamp comes on.
Note: You can set an additional delay for the STO activation (parameter SS1.15 SS1-r
ramp zero speed delay for STO).
4. a) Time A has elapsed. The STO function is already active. In this case, this time has
no effect.
5. a) The user releases the emergency stop button.
6. a) The user pushes the reset button (this resets the emergency stop circuit and
acknowledges the STO function).
7. a) The FSO module deactivates the STO function in the drive. The emergency stop
indication lamp goes off. The drive is ready for a restart.
3a 4a
Option description 19
5a
6a 7a
Time
E-stop button
(SS1 request)
Drive STO
status
Reset button
Indication lamp