Installation manual

Detected Fault Management Parameters
132 S1A53838 09/2011
Overtorque Detection
The drive’s response to a particular motor torque level is determined by the setting of parameters F615 –
F619.
Overtorque
Signal Output
Torque Current (%)
Time (Sec)
OFF
ON
OFF
Less Than F618
Code Name / Description Adjustment range Factory setting
F615 [Overtorque det.]
Overtorque detected fault/Alarm Selection - 0
0
1
[Alarm]
If parameter F633 is set to 0, the drive will not monitor for loss of signal at analog input terminal VIA.
[Fault]
If parameter F615 is set to 1 and the drive faults, the overtorque signal output will remain latched on until the detected fault is
cleared.
Depending on the setting of parameter F615, the drive can use output relay function 12 or 13 (see table on pages 98
) to signal
an overtorque alarm or detected fault (Ot code).
F616 [Overtorque level]
Overtorque Detection Level 0 to 250 % of nominal
rated motor torque
130%
The setting of parameter F616 determines the level at which the drive will act upon a motor overtorque condition (see diagrams
above and below).
Output relay functions 20 or 21 can be used to signal a overtorque pre-alarm when the calculated motor torque reaches 70% of
the value set by parameter F616.
F618 [OvTorque det time]
Overtorque Detection Time 0.0 to 10 s 0.5 s
The setting of parameter F618 determines how long the drive needs to detect a motor overtorque condition before it signals an
alarm or detected fault (see above diagram).
F619 [Overtorque band]
Overtorque Detection Level Bandwidth 0 to 100 % of F616
level
10%
While the setting of parameter F616 determines the level at which a motor overtorque alarm or detected fault will be signaled,
the setting of parameter F619 determines how far the calculated motor torque needs to drop before the alarm or detected fault
is cleared (see above diagram).
x 0.7
x 0.7
Overtorque Pre-Alarm
Signal Output
Torque Current (%)
Time (Sec)
ON OFF ONOFF
Output Frequency
level 2