
Use
1.
Open the activation switch, or activate the safety functionality that is wired to the STO
connection.
2.
The STO inputs on the drive control unit de-energize, and the control unit cuts off the
control voltage from the output IGBTs.
3.
The control program generates an indication as defined by parameter
31.22
(see the
firmware manual of the drive).
4.
The motor coasts to a stop (if running). The drive will not restart while the activation
switch or safety relay contacts are open.
5.
Deactivate the STO by closing the activation switch, or resetting the safety functionality
that is wired to the STO connection.
6.
Reset any faults before restarting.
WARNING!
The Safe torque off function does not disconnect the voltage of the main and auxiliary
circuits from the drive. Therefore maintenance work on electrical parts of the drive
or the motor can only be carried out after isolating the drive from the supply and all
other voltage sources.
WARNING!
The Safe torque off functionality is only achieved through the XSTO connector of
the inverter control unit (A41). True Safe torque off functionality is not achieved
through the XSTO connectors of other control units (such as the supply control unit
or the brake control unit).
The Safe torque off function is supported by any ACS880 inverter or drive control
program. It is not supported by supply, DC/DC converter or brake firmware.
WARNING!
The drive cannot detect or memorize any changes in the STO circuitry when the
drive control unit is not powered. If both STO circuits are closed and a level-type
start signal is active when the power is restored, it is possible that the drive starts
without a fresh start command. Take this into account in the risk assessment of the
system.
WARNING!
(With permanent magnet or synchronous reluctance [SynRM] motors only)
In case of a multiple IGBT power semiconductor failure, the drive can produce an
alignment torque which maximally rotates the motor shaft by 180/
p
degrees (with
permanent magnet motors) or 180/2
p
degrees (with synchronous reluctance [SynRM]
motors) regardless of the activation of the Safe torque off function.
p
denotes the
number of pole pairs.
Notes:
•
If a running drive is stopped by using the Safe torque off function, the drive will cut off
the motor supply voltage and the motor will coast to a stop. If this causes danger or is
The Safe torque off function 227
Содержание ACS880-37LC-0390A-7
Страница 1: ... ABB INDUSTRIAL DRIVES ACS880 37LC drives Hardware manual ...
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Страница 13: ...16 Resistor braking Further information Table of contents 13 ...
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Страница 70: ...70 Mechanical installation ...
Страница 110: ...10 110 Electrical installation ...
Страница 113: ...With FDPI 02 modules OPEN TERMINATED 1 1 2 2 OPEN TERMINATED 3 Electrical installation 113 11 ...
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Страница 148: ...a b c 148 Maintenance ...
Страница 151: ...4 5 6 Maintenance 151 ...
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Страница 199: ... Dimension drawing examples ACS880 37LC 0390A 7 with main contactor Dimensions 199 ...
Страница 201: ...ACS880 37LC 1270A 7 with common motor terminal cubicle Dimensions 201 ...
Страница 202: ...ACS880 37LC 1940A 7 with common motor terminal cubicle 202 Dimensions ...
Страница 205: ...Location and size of input terminals Contact ABB for details Dimensions 205 ...
Страница 206: ... 100 kA input cubicle option F274 206 Dimensions ...
Страница 208: ...Inverter module cubicle with two R8i modules bottom cable exit 208 Dimensions ...
Страница 209: ...Inverter module cubicle with three R8i modules bottom cable exit Dimensions 209 ...
Страница 210: ...Brake chopper cubicle 210 Dimensions ...
Страница 211: ... Units with common motor terminal cubicle H359 Cubicle width 300 mm bottom cable exit Dimensions 211 ...
Страница 212: ...Cubicle width 300 mm top cable exit 212 Dimensions ...
Страница 213: ...Cubicle width 400 mm bottom cable exit Dimensions 213 ...
Страница 214: ...Cubicle width 400 mm top cable exit 214 Dimensions ...
Страница 215: ...Cubicle width 600 mm bottom cable exit Dimensions 215 ...
Страница 216: ...Cubicle width 600 mm top cable exit 216 Dimensions ...
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