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Safety and protections
■
Emergency stop
The emergency stop signal is connected to the input selected by parameter
An emergency stop can also be generated through fieldbus (parameter
, bits
0…2).
The mode of the emergency stop is selected by parameter
. 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
.
With Off1 or Off3 emergency stop modes, the ramp-down of the motor speed can
be supervised by parameters
and
.
Note:
•
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
,
,
and
) and reference ramp shapes (
…
) are ignored in case of
emergency ramp stops.
Settings and diagnostics
Parameters:
6.17 Drive status word 2 (page 193)
,
21.4 Emergency stop mode (page 292)
,
23.23 Emergency stop time (page 314)
,
25.14 Max torq sp ctrl em stop (page 331)
31.32 Emergency ramp supervision (page 374)
and
Emergency ramp supervision delay (page 374)
Program features 127
Содержание ACS880 Series
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