ABB ACS880-17, User Manual

Page: 16 / 58

16 Option description and instructions
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Emergency stop, stop category 1
This is a controlled stop (EN/IEC 60204-1). When the user pushes the emergency
stop button, he/she actually activates the Safe stop 1 function (SS1) of the FSO
module. After the drive has decelerated the motor below a user-defined zero speed
limit, the FSO module activates the STO function of the drive.
The SS1 function operates either in time monitoring or in ramp monitoring mode. In
time monitoring mode, the FSO module monitors that a user-defined deceleration time
limit is not exceeded. In ramp monitoring mode, the FSO module monitors that the
motor decelerates along a user-defined stop ramp.
The user cannot start the drive before he/she has released the emergency stop button and
pushed the emergency stop reset button. This resets the emergency stop circuit and
deactivates the drive STO function.
Note : ACS880-07 drives, frames nxDXT + nxR8i with a main contactor/breaker (option
+F250/+F255), ACS880-17/37 drives, frames nxR8i + nxR8i and ACS880-17/37 drives,
frames R8 and R11: When the STO function is activated in the inverter unit, the main
contactor/breaker is opened after a user-defined delay (defined with parameter
94.11 , the
default value is 600 s ). See the hardware and firmware manuals for more information.
For a detailed description of the Safe torque off function, see the hardware manual of your
drive
.
For more information on the safety functions of the FSO module, see FSO-12 safety
functions module user’s manual (3AXD50000015612 [English]) or FSO-21 safety
functions module user’s manual (3AXD50000015614 [English]).
For more information on the FSE module, see FSE-31 pulse encoder interface module
user’s manual (3AXD50000016597 [English]).
The design principles of the Q979 comply with EN ISO 13850.
The STO and SS1 functions comply with EN/IEC 61800-5-2:2007. For a complete list of
related standards and European directives, see section
Related standards and directives
on page 55.

Summary of wirings and settings
The wirings and settings of the emergency stop function are:
•
The drive is equipped with the FSO safety functions module (Q973 or +Q972).
ABB installs the module at the factory.
•
One emergency stop button is installed on the cabinet door and wired to the FSO
module. ABB wires the button at the factory. The user can add buttons to the
emergency stop circuit.
•
One emergency stop reset button is installed on the cabinet door and wired to the FSO
module. The reset button also includes an emergency stop indication lamp (see the
next bullet). ABB wires the button and the indication lamp at the factory. The user can
add reset buttons to the reset circuit.
•
The digital output of the FSO module to which the emergency stop indication lamp is
connected, is selected as the output for the Stop completed signal. This is an FSO
module parameter that ABB sets at the factory by default and the user must check at
the start-up.