YASKAWA G7 Series Technical Manual page 392

Display
OL3
Overtorque 1
(blinking)
There has been a current greater than
Over-
the setting in L6-02 for longer than the
torque
setting in L6-03.
Det 1
OL4
Overtorque 2
(blinking)
There has been a current greater than
Over-
the setting in L6-05 for longer than the
torque
setting in L6-06.
Det 2
UL3
Undertorque 1
(blinking)
There has been a current less than the
Under-
setting in L6-02 for longer than the
torq Det
setting in L6-03.
1
UL4
Undertorque 2
(blinking)
There has been a current less than the
Under-
setting in L6-05 for longer than the
torq Det
setting in L6-06.
2
OS
Overspeed
(blinking)
The speed has been greater than the
Over-
setting in F1-08 for longer than the
speed
setting in F1-09.
Det
The PG is disconnected
PGO
The Drive is outputting a frequency,
(blinking)
PG Open
but PG pulses aren't being input.
DEV
Excessive Speed Deviation
(blinking)
The speed deviation has been greater
Speed
than the setting in F1-10 for longer
Devia-
than the setting in F1-11.
tion
External fault detected for Commu-
EF0
nications Card other than SI-K2
Opt
Continuing operation was specified
External
for EF0 (F6-03 = 3)and an external
Flt
fault was input from the Option Card.
-10
7
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Table 7.2 Alarm Displays and Processing (Continued)
Meaning
Overshooting/undershooting are
occurring.
The reference speed is too high.
The settings in F1-08 and F1-09 aren't
appropriate.
There is a break in the PG wiring.
The PG is wired incorrectly.
Power isn't being supplied to the PG.
The load is too large.
The acceleration time and decelera-
tion time are too short.
The load is locked.
The settings in F1-10 and F1-11 aren't
appropriate.
Probable causes
• Make sure that the settings in L6-02
-
• Check the mechanical system and
• Make sure that the current setting in
-
• Check the mechanical system and
• Make sure that the settings in L6-02
-
• Check the mechanical system and
• Make sure that the current setting in
-
• Check the mechanical system and
Adjust the gain again.
Check the reference circuit and refer-
ence gain.
Check the settings in F1-08 and F1-09.
Fix the broken/disconnected wiring.
Fix the wiring.
Supply power to the PG properly.
Reduce the load.
Lengthen the acceleration time and
deceleration time.
Check the mechanical system.
Check the settings in F1-10 and F1-11.
- Remove the cause of the external fault.
Corrective Actions
and L6-03 are appropriate.
correct the cause of the overtorque.
L6-05 and time setting in L6-06 are
appropriate.
correct the cause of the overtorque.
and L6-03 are appropriate.
correct the cause of the overtorque.
L6-05 and time setting in L6-06 are
appropriate.
correct the cause of the overtorque.