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 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 not otherwise acceptable, stop the drive and machinery using the appropriate
stop mode before activating the Safe torque off function.
218 The Safe torque off function
Содержание ACS880-11
Страница 1: ... ABB INDUSTRIAL DRIVES ACS880 11 drives Hardware manual ...
Страница 2: ......
Страница 4: ......
Страница 26: ...26 ...
Страница 52: ...52 ...
Страница 82: ...82 ...
Страница 95: ...R6 R8 IP21 R6 R8 IP55 Electrical installation IEC 95 ...
Страница 103: ...R6 1 5 N m 0 5 N m Electrical installation IEC 103 ...
Страница 104: ...R8 1 5 N m 0 5 0 6 N m 104 Electrical installation IEC ...
Страница 112: ...With FDPI 02 modules OPEN TERMIN ATED 1 1 2 2 OPEN TERMINATED 3 112 Electrical installation IEC ...
Страница 116: ...R6 R8 UL Type 1 R6 R8 UL Type 12 116 Electrical installation North America NEC ...
Страница 120: ...R3 7 7 8 8 L1 L2 L3 T1 U T2 V T3 W PE Ground 1 7 N m 1 2 lbf ft 120 Electrical installation North America NEC ...
Страница 142: ...142 ...
Страница 154: ... Fan arrow must point up 154 Maintenance ...
Страница 160: ...160 ...
Страница 181: ... Package dimensions R6 R3 R8 Technical data 181 ...
Страница 202: ...R3 IP21 UL Type 1 3AXD50000045323 202 Dimension drawings ...
Страница 203: ...R3 Option B056 IP55 UL Type 12 3AXD50000045322 Dimension drawings 203 ...
Страница 204: ...R6 IP21 UL Type 1 3AXD50000045353 204 Dimension drawings ...
Страница 205: ...R6 Option B056 IP55 UL Type 12 3AXD50000045352 Dimension drawings 205 ...
Страница 206: ...R8 IP21 UL Type 1 3AXD50000047667 206 Dimension drawings ...
Страница 207: ...R8 Option B056 IP55 UL Type 12 3AXD50000047667 Dimension drawings 207 ...
Страница 208: ...208 ...
Страница 225: ... Declarations of conformity The Safe torque off function 225 ...