6.5 Alarm Detection
258
YASKAWA ELECTRIC
SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
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.
Cause
Possible Solutions
Minor Fault
Output
(H2-
= 10)
An external device has tripped an alarm
function.
Remove the cause of the external fault and reset the multi-function input value.
YES
Wiring is incorrect.
• Ensure the signal lines have been connected properly to the terminals assigned for
external fault detection (H1-
= 20 to 2F).
• Reconnect the signal line.
YES
Multi-function contact inputs are set
incorrectly.
• Check if the unused terminals have been set for H1-
= 20 to 2F (External Fault).
• Change the terminal settings.
YES
LED Operator Display
Minor Fault Name
FbH
Excessive PID Feedback
The PID feedback input is higher than the level set in b5-36 for longer than the time set in b5-37, and
b5-12 is set to 1 or 4.
Cause
Possible Solutions
Minor Fault
Output
(H2-
= 10)
Parameters settings for b5-36 and b5-37
are incorrect.
Check parameters b5-36 and b5-37.
YES
PID feedback wiring is faulty.
Correct the wiring.
YES
Feedback sensor has malfunctioned.
Check the sensor and replace it if damaged.
YES
Feedback input circuit is damaged.
Replace the drive.
YES
LED Operator Display
Minor Fault Name
FbL
PID Feedback Loss
The PID feedback input is lower than the level set in b5-13 for longer than the time set in b5-14, and
b5-12 is set to 1 or 4.
Cause
Possible Solutions
Minor Fault
Output
(H2-
= 10)
Parameters settings for b5-13 and b5-14
are incorrect.
Check parameters b5-13 and b5-14.
YES
PID feedback wiring is faulty.
Correct the wiring.
YES
Feedback sensor has malfunctioned.
Check the sensor and replace it if damaged.
YES
Feedback input circuit is damaged.
Replace the drive.
YES
