Safety And Protections; Emergency Stop; Motor Thermal Protection - ABB ACS880 Firmware Manual

Safety and protections



Emergency stop

The emergency stop signal is connected to the input selected by parameter
Emergency stop source. An emergency stop can also be generated through fieldbus
(parameter 06.01 Main control
The mode of the emergency stop is selected by parameter
mode. The following modes are available:
• Off1: Stop along the standard deceleration ramp defined for the particular
reference type in use
• Off2: Stop by coasting
• Off3: Stop by the emergency stop ramp defined by parameter
stop time.
With Off1 or Off3 emergency stop modes, the ramp-down of the motor speed can be
supervised by parameters
ramp supervision delay.
Notes:
• For SIL 3 / PL e-level emergency stop functions, the drive can be fitted with a
TÜV-certified FSO-xx safety options module. The module can then be
incorporated into certified safety systems.
• The installer of the equipment is responsible for installing the emergency stop
devices and all additional devices needed for the emergency stop function to fulfill
the required emergency stop categories. For more information, contact your local
ABB representative.
• After an emergency stop signal is detected, the emergency stop function cannot
be canceled even though the signal is canceled.
• If the minimum (or maximum) torque limit is set to 0%, the emergency stop
function may not be able to stop the drive.
Settings
Parameters 21.04 Emergency stop mode
(page 152), 23.23 Emergency stop time
supervision (page 201) and


Motor thermal protection

The control program features two separate motor temperature monitoring functions.
The temperature data sources and warning/trip limits can be set up independently for
each function.
The motor temperature can be monitored using
• the motor thermal protection model (estimated temperature derived internally
inside the drive), or
word, bits 0...2).
31.32 Emergency ramp supervision
(page 152),
(page 167),
31.33 Emergency ramp supervision delay
Program features 61
21.04 Emergency stop
23.23 Emergency
and 31.33 Emergency
21.05 Emergency stop source
31.32 Emergency ramp
(page 202).
21.05