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!
(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.
•
The Safe torque off function overrides all other functions of the drive.
•
The Safe torque off function is ineffective against deliberate sabotage or misuse.
•
The Safe torque off function has been designed to reduce the recognized hazardous
conditions. In spite of this, it is not always possible to eliminate all potential hazards.
The assembler of the machine must inform the final user about the residual risks.
•
The Safe torque off diagnostics are not available during power outages, or when the
drive is only powered by a CMOD-xx multifunction extension module.
The Safe torque off function 181
Summary of Contents for ACH580-04
Page 1: ... ABB DRIVES FOR HVAC ACH580 04 drive modules Hardware manual ...
Page 2: ......
Page 4: ......
Page 54: ...54 ...
Page 88: ...88 ...
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Page 118: ...118 ...
Page 122: ...122 ...
Page 124: ...124 ...
Page 128: ...3 6 5 5 128 Maintenance ...
Page 134: ...134 ...
Page 156: ...R10 standard configuration 156 Dimension drawings ...
Page 157: ...R10 with E208 0H354 H356 H370 0H371 Dimension drawings 157 ...
Page 158: ...R10 with option B051 158 Dimension drawings ...
Page 159: ...R10 with option E208 H356 P906 192 Tools R10 3 1 Dimension drawings 159 ...
Page 160: ...R10 with option E208 0H371 H356 0H354 H370 P906 Tools 191 R10 2 1 160 Dimension drawings ...
Page 161: ...R10 with option B051 P906 190 Tools R10 1 1 Dimension drawings 161 ...
Page 162: ...R11 standard configuration 162 Dimension drawings ...
Page 163: ...R11 with option E208 0H371 H356 0H354 H370 Dimension drawings 163 ...
Page 164: ...R11 with option B051 164 Dimension drawings ...
Page 165: ...R11 with option E208 H356 P906 Dimension drawings 165 ...
Page 166: ...R11 with option E208 0H371 H356 0H354 H370 P906 166 Dimension drawings ...
Page 167: ...R11 with option B051 P906 Dimension drawings 167 ...
Page 186: ... Declaration of conformity 186 The Safe torque off function ...
Page 206: ...Dimension drawing 206 External control unit option P906 ...
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