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Protective and Diagnostic Functions
7-
7
PGO
PG Open
PG Disconnect Detected
No PG pulse were input when the
MxC was outputting a frequency.
The PG wiring is broken or discon-
nected.
Fix the broken/disconnected wir-
ing.
The PG is wired incorrectly.
Fix the wiring.
Power isn't being supplied to the PG.
Supply power to the PG properly.
-
Check for open circuit when using
brake (motor).
DEV
Speed
Deviation
Excessive Speed Deviation
The speed deviation has been greater
than the setting in F1-10 for longer
than the setting in F1-11.
The load is too heavy.
Reduce the load.
The acceleration time and deceleration
time are too short.
Lengthen the acceleration time
and deceleration time.
The load is locked.
Check the mechanical system.
The settings in F1-10 and F1-11 aren't
appropriate.
Check the settings in F1-10 and
F1-11.
-
Check for open circuit when using
brake (motor).
CF
Ctl Fault
Control Fault
The torque limit was continuously
reached for three seconds or longer
during a decelerate to stop with Open
Loop Vector Control.
Motor parameter settings are not cor-
rect.
• Check the motor parameters.
• Perform Auto-Tuning.
FBL
Feedback
Loss
PID Feedback Reference Lost
A PID feedback reference loss was
detected (b5-12 = 2) and the PID feed-
back input was less than b5-13 (PID
feedback loss detection level) for
longer than the time set in b5-14 (PID
feedback loss detection time).
-
-
EF0
Opt Exter-
nal Flt
External Fault Input from
Communications Option Card
-
Check the Communications
Option Card and communications
signals.
EF3
Ext Fault
S3
External Fault (Input Terminal S3)
An “external fault” was input from a
multi-function input terminal.
• Reset external fault inputs to the
multi-function inputs.
• Remove the cause of the exter-
nal fault.
EF4
Ext Fault
S4
External Fault (Input Terminal S4)
EF5
Ext Fault
S5
External Fault (Input Terminal S5)
EF6
Ext Fault
S6
External Fault (Input Terminal S6)
EF7
Ext Fault
S7
External Fault (Input Terminal S7)
EF8
Ext Fault
S8
External Fault (Input Terminal S8)
EF9
Ext Fault
S9
External Fault (Input Terminal S9)
Table 7.1 Fault Displays and Processing (Continued)
Display
Meaning
Probable Causes
Corrective Actions