Fault Reaction Function; Parameter Settings - ABB ACS880-07 User Manual

16 Option description and instructions
Step Operation
2. The emergency stop safety relay [A61] de-energizes relays [K62.1] and [K62.2].
The auxiliary safety relay [K62.1] de-energizes the main contactor [Q2].
The main contactor [Q2] switches off the power supply to the drive module [T1].
The auxiliary relay [K62.2] switches off the DIIL input of the supply unit control board [A51] and the
XSTO inputs IN1 and IN2 of the inverter unit control board [A41].
If the charging contactor [Q4] is closed, it is opened.
3. The emergency stop indication lamp [P62] of emergency stop reset button [S62] switches on.
4. The motor coasts to zero speed and remains at zero speed while the emergency stop is active.
5. Normal operation resumes after the user:
• releases the emergency stop button [S61] to normal (up) position
• resets the emergency stop circuit with the emergency stop reset button [S62]
• resets the drive (if the STO indication parameter 31.22 has been set so that a fault is generated).
If the drive is used in remote control mode, see firmware manual for more information.

Fault reaction function

Definition: A safety function requires a "fault reaction function" that attempts to initiate a
safe state if the safety function's diagnostics detect a fault within the hardware/software
that performs the safety function.
The fault reaction function of the emergency stop safety relay [A61] trips if it detects a
failure (short circuit between signals, open circuits, redundancy fault when the emergency
stop button is pushed) in the safety circuit. The fault reaction function shifts the drive
immediately into the safe state by switching on the drive emergency stop command,
opening the main contactor, and keeping them on until the detected fault has been
repaired. The indication lamp [P62] of the reset button [S62] is on until the fault has been
repaired.
The emergency stop reset circuit must be open when the user releases the emergency
stop button. The emergency stop safety relay [A61] detects if the reset circuit is closed and
the relay does not close.

Parameter settings

The parameter setting in ACS880 primary control program:
•
parameter 31.22 STO indication run/stop is set to value Warning/Warning
(recommended).
Additional parameter settings for ACS880-07 drives, frames nxDXT + nxR8i and
ACS880-17/37 drives, frames nxR8i + nxR8i
Note: ACS880 primary control program controls the inverter unit by default. There are
dedicated control boards for the supply and inverter units.
The supply unit parameter settings in the ACS880 supply control programs:
•
parameter 121.04 Emergency stop mode is set to value Stop and warning
•
parameter 121.05 Emergency stop source is set to value DIIL.
For more information, see the firmware manuals.