7-6
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).
The settings in b5-13 and b5-14 aren’t
appropriate.
Check the settings in b5-13 and
b5-14.
The wiring of the PID feedback circuit
is incorrect.
Fix the wiring.
EF0
Opt Exter-
nal Flt
External Fault Input from Commu-
nications Option Board
-
Check the Communications
Option Board and communica-
tions signals.
EF3
Ext Fault
S3
External Fault (Input Terminal 3)
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 4)
EF5
Ext Fault
S5
External Fault (Input Terminal 5)
EF6
Ext Fault
S6
External Fault (Input Terminal 6)
EF7
Ext Fault
S7
External Fault (Input Terminal 7)
EF8
Ext Fault
S8
External Fault (Input Terminal 8)
EF9
Ext Fault
S9
External Fault (Input Terminal 9)
EF10
Ext Fault
S10
External Fault (Input Terminal 10)
EF11
Ext Fault
S11
External Fault (Input Terminal 11)
EF12
Ext Fault
S12
External Fault (Input Terminal 12)
SVE
Zero Servo
Fault
Zero-servo Fault
The rotation position moved during
zero-servo operation.
The torque limit is too small. Increase the limit.
The load torque is too large. Reduce the load torque.
- Check for signal noise.
OPR
Oper Dis-
connect
Digital Operator Connection Fault
The connection to the Digital Operator
was broken during operation for a Run
Command from the Digital Operator.
-
Check the connection to the Digi-
tal Operator.
Table 7.1 Fault Displays and Processing (Continued)
Display Meaning Probable Causes Corrective Actions
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