Fault Reaction Function; Hardware Settings - ABB ACS880-07CLC User Manual

Step Operation
3 The emergency stop reset button indicator light [S62] comes on.
4 The motor coasts to a stop.
5 Normal operation resumes after the user:
•releases the emergency stop button [S61] to the normal (up) position
•pushes the emergency stop reset button [S62] for 0.1 ... 3 seconds
•resets the faults from the drive (if the drive tripped on a fault)
•makes sure that the drive receives the start signal (depends on the configuration, see the firmware
manual).

Fault reaction function

Definition: A safety function requires a "fault reaction function" that tries to initiate a safe
state if it detects a failure in the safety system.
The fault reaction function of the emergency stop safety relay trips the system, if it detects
a failure in the safety circuit (for example, short circuit between signals, open circuit, or
redundancy fault).
If a fault is detected, the fault reaction function:
• activates the emergency stop command
• activates the drive STO function
• opens the main contactor/breaker
• keeps the safe state activated and the emergency stop reset button indicator light on
until the fault is repaired and the safety function is reset.
Note: Resetting the safety function is not possible, if the reset circuit in the emergency stop
safety relay is open.

Hardware settings

The hardware settings for the safety function are set at the factory.
The emergency stop safety relay [A640] is set to the manual reset mode at the factory. Do
not change this setting.
For more information, see the circuit diagrams delivered with the drive.
Option description 17