The CE detection time (H5-09) is set
shorter than the time required for a
communication cycle to take place.
• Check the PLC.
• Change the software settings in the PLC.
• Set a longer CE detection time (H5-09).
YES
Incompatible PLC software settings or
there is a hardware problem.
• Check the PLC.
• Remove the cause of the error on the controller side.
YES
Communications cable is disconnected or
damaged.
• Check the connector for a signal through the cable.
• Replace the communications cable.
YES
LED Operator Display
Minor Fault Name
CrST
Can Not Reset
Cause
Possible Solutions
Minor Fault
Output
(H2-
= 10)
Fault reset was being executed when a run
command was entered.
• Ensure that a run command cannot be entered from the external terminals or option
card during fault reset.
• Turn off the run command.
YES
LED Operator Display
Minor Fault Name
dEv
Speed Deviation (for Simple V/f with PG)
According to the pulse input (RP), the speed deviation is greater than the setting in F1-10 for a time longer
than the setting in F1-11.
Cause
Possible Solutions
Minor Fault
Output
(H2-
= 10)
Load is too heavy
Reduce the load.
YES
Acceleration and deceleration times are set
too short.
Increase the acceleration and deceleration times (C1-01 through C1-08).
YES
The load is locked up.
Check the machine.
YES
Parameter settings are inappropriate.
Check the settings of parameters F1-10 and F1-11.
YES
The motor brake engaged.
Ensure the brake releases properly.
YES
LED Operator Display
Minor Fault Name
dnE
Drive Disabled
Cause
Possible Solutions
Minor Fault
Output
(H2-
= 10)
“Drive Enable” is set to a multi-function
contact input (H1-
= 6A) and that
signal was switched off.
Check the operation sequence.
YES
LED Operator Display
Minor Fault Name
EF
Forward/Reverse Run Command Input Error
Both forward run and reverse run closed simultaneously for over 0.5 s.
Cause
Possible Solutions
Minor Fault
Output
(H2-
= 10)
Sequence error
Check the forward and reverse command sequence and correct the problem.
Note:
When minor fault EF detected, motor ramps to stop.
YES
LED Operator Display
Minor Fault Name
EF0
Option Card External Fault
An external fault condition is present.
Cause
Possible Solutions
Minor Fault
Output
(H2-
= 10)
An external fault was received from the
PLC with F6-03 = 3 (causing the drive to
continue running when an external fault
occurs).
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
YES
There is a problem with the PLC program. Check the PLC program and correct problems.
YES
LED Operator Display
Minor Fault Name
EF1
External fault (input terminal S1)
External fault at multi-function input terminal S1.
EF2
External fault (input terminal S2)
External fault at multi-function input terminal S2.
EF3
External fault (input terminal S3)
External fault at multi-function input terminal S3.
EF4
External fault (input terminal S4)
External fault at multi-function input terminal S4.
EF5
External fault (input terminal S5)
External fault at multi-function input terminal S5.
EF6
External fault (input terminal S6)
External fault at multi-function input terminal S6.
6.5 Alarm Detection
242
SIEP C710606 20 OYMC AC Drive - V1000 User Manual
7/16/2008-13:23