ABB ACS880-07 User Manual page 27

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. a) The motor speed reaches the zero speed limit (B). The FSO module activates the
drive STO function and stops the ramp monitoring. 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) 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. 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
Motor speed
A
B
1
2
A Safety function response time.
B Zero speed limit: Speed limit for activating the STO function. This is a user-defined value
(parameter FSOGEN.52 Zero speed with encoder).
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).
3b 4b
5b
6b 7b
Option description 27
Time
E-stop button
(SS1 request)
Drive STO
status
Reset button
Indication lamp