26 Option description and instructions
A
Security delay: When time A has elapsed from the start of the counter (step 1), the FSO module
activates FSO and drive STO functions (case B). In case A, the FSO module has already activated
the STO function. This is a user-defined value (parameter
).
B
Zero speed limit:
Speed limit for activating the drive STO function. This is a user-defined value
(parameter
C
Safety function response time.
Step
Description
1
The user pushes the emergency stop button (this activates the SS1 function of the FSO module). The
FSO module starts a counter for time A.
Note
: The safety function request to the FSO module must be active for at least 20 ms.
2
The drive starts to decelerate the motor along the user-defined stop ramp (SAR1 parameter
).
Case A
The motor speed goes below the zero speed limit within the user-defined time.
3a
The motor speed goes below the zero speed limit (B). The FSO module activates the drive STO
function. The emergency stop indication lamp goes on.
Note
: You can set an additional delay for the
STO activation (parameter
SS1-r ramp zero speed delay for STO
4a
Time A has elapsed. The STO function is already active. In this case, this time has no effect.
5a
The user releases the emergency stop button.
6a
The user pushes the reset button (this resets the emergency stop circuit and removes the emergency
stop request from the FSO module).
Note
: The pressing time of the reset button must be between 0.3 s...3 s.
7a
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
: Time A has elapsed from the emergency stop command (step 1) but the motor speed still exceeds
the zero speed limit.
3b
The FSO module activates the FSO and drive STO functions.The motor coasts to a stop.
4b
The motor speed goes below the zero speed limit (B). The motor has stopped and the user can push
the reset button, that is, acknowledgement of the STO function is possible. The emergency stop
indication lamp goes on.
5b
The user releases the emergency stop button.
6b
The user pushes the reset button (this resets the emergency stop circuit and removes the emergency
stop request from the FSO module).
Note
: The pressing time of the reset button must be between 0.3 s...3 s.
7b
The FSO module deactivates the STO function in the drive. The emergency stop indication lamp
goes off.
The user must reset the drive before the drive is ready for a restart (this is because the FSO
module generates a fault to the drive after a limit hit [parameter
]).
Summary of Contents for ACS880-17
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Page 7: ...7 Document library on the Internet 57...
Page 8: ...8...
Page 34: ...34 Option description and instructions...
Page 48: ...48 Start up and acceptance test...
Page 56: ...56 Technical data...
Page 58: ...3AUA0000145921 Rev E EN 2018 02 02 Contact us www abb com drives www abb com drivespartners...