ABB ACS850-04 series, Firmware Manual

Page: 176 / 296

176 Parameters
30.07 Sto diagnostic Selects how the drive reacts when the drive detects that the
Safe Torque Off function is active while the drive is stopped.
The Safe Torque Off function disables the control voltage of
the power semiconductors of the drive output stage, thus
preventing the inverter from generating the voltage required
to rotate the motor. For the wiring of the Safe Torque Off
circuit, see the appropriate hardware manual.
Notes:
• This parameter is for supervision only. The Safe Torque Off
function can activate even when this parameter is set to
No .
• Fault STO 1 LOST / STO 2 LOST is activated if safety
circuit signal 1/2 is lost when the drive is in stopped state
and this parameter is set to
Alarm or No .
Fault The drive trips on fault SAFE TORQUE OFF. 1
Alarm The drive generates alarm SAFE TORQUE OFF. 2
No No action taken. 3
30.08 Cross connection Selects how the drive reacts to incorrect input power and
motor cable connection (i.e. input power cable is connected
to drive motor connection).
No No action taken. 0
Fault The drive trips on fault CABLE CROSS CON. 1
30.09 Stall function Selects how the drive reacts to a motor stall condition. The
protection wakes up if
• the drive is at stall current limit (defined by parameter
30.10 Stall curr lim ) or 06.05 Limit word1 differs from 0
• the output frequency is below the level set by parameter
30.11 Stall freq hi , and
• the conditions above have been valid longer than the time
set by parameter 30.12 Stall time .
See section Stall protection (parameters 30.09…30.12) on
page 73 .
30.10 Stall curr lim Stall current limit in percent of the nominal current of the
motor. See parameter
30.09 Stall function .
0.0 … 1600.0% Stall current limit. 10 = 1%
30.11 Stall freq hi Stall frequency limit. See parameter 30.09 Stall function .
0.5 … 1000.0 Hz Stall frequency limit. 10 = 1 Hz
30.12 Stall time Stall time. See parameter 30.09 Stall function .
0 … 3600 s Stall time. 1 = 1 s
No. Name/Value Description FbEq
Bit Function
0 Ena sup (Enable supervision)
0 = Disabled: Supervision disabled.
1 = Enabled: Supervision enabled.
1 Ena warn (Enable warning)
0 = Disabled
1 = Enabled: Drive generates an alarm upon a stall condition.
2 Ena fault (Enable fault)
0 = Disabled
1 = Enabled: Drive trips on a fault upon a stall condition.