Safety And Protections; Emergency Stop - ABB ACS880-x04 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.
• Speed and torque reference additives (parameters 22.15, 22.17, 26.16,
26.41) and reference ramp shapes (23.16...23.19) are ignored in case of
emergency ramp stops.
Settings
Parameters 06.17 Drive status word 2
(page 134), 21.04 Emergency stop mode
(page 207), 23.23 Emergency stop time
(page 237), 25.14 Max torq sp ctrl em stop
stop (page 237), 31.32 Emergency ramp supervision
Emergency ramp supervision delay
word, bits 0...2).
31.32 Emergency ramp supervision
(page 133),
(page 207),
(page 223),
(page 237),
(page 279).
Program features 79
21.04 Emergency stop
23.23 Emergency
and 31.33 Emergency
06.18 Start inhibit status word
21.05 Emergency stop source
25.13 Min torq sp ctrl em stop
25.15 Proportional gain em
(page 278) and
21.05
26.25 and
31.33