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34 Description of option +Q952+Q984
Step
Operation
6
The emergency stop reset button indicator light [S62] comes on.
7
Normal operation resumes after the user:
•releases the emergency stop button [S61] or the user-defined button to the normal (up) position
•pushes the emergency stop reset button [S62] for 0.1 ... 3 seconds to reset the emergency stop
circuit
•closes the main contactor/breaker [Qx]
•makes sure that the inverter units receive the start signals (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 primary safety circuit (emergency stop button [S61] and its connections). A
failure can be, for example, an open circuit. A line fault in a push button monitoring circuit
does not cause the fault reaction function to activate.
If a fault is detected, the fault reaction function:
• activates the emergency stop command
• activates the inverter unit STO function (not applicable to ACS880 multidrives)
• 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.
If you hold the reset button [S62] pushed for more than 10 seconds, the emergency stop
safety relay [A61] goes into a fault state. You must then reset the relay. See the fault tracing
instructions.
Parameter settings
This section gives the parameters related to the safety function. Make sure that the values
agree with the circuit diagrams delivered with the drive.
ACS880-07LC/17LC/37LC drives
￭
The parameter settings in the ACS880 primary control program:
No.
Name
14.01
Module 1 type
14.02
Module 1 loca-
tion
14.09
DIO 1 function
14.14
DIO 2 function
1)
Description
Default value
FIO-01
Activates (and specifies the type of) I/O extension module
1.
Slot 1
Specifies the slot (1...3) on the control unit of the drive into
which the I/O extension module is installed.
Input
Selects whether DIO1 of the extension module is used as a
digital input or output.
Input
Selects whether DIO2 of the extension module is used as a
digital input or output.
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