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6.5 Alarm Detection
368
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
Digital 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
(H2-01 = 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
Digital Operator Display
Minor Fault Name
EF0
Option Card External Fault
An external fault condition is present.
Cause
Possible Solutions
Minor Fault
(H2-01 = 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.
Digital 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.
EF7
External fault (input terminal S7)
External fault at multi-function input terminal S7.
EF8
External fault (input terminal S8)
External fault at multi-function input terminal S8.
Cause
Possible Solutions
Minor Fault
(H2-01 = 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-
= 2C to 2F).
• Reconnect the signal line.
Multi-function contact inputs are set incorrectly.
• Check if the unused terminals have been set for H1-
= 2C to 2F (External Fault).
• Change the terminal settings.
Digital 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
(H2-01 = 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.
Feedback sensor has malfunctioned.
Check the sensor and replace it if damaged.
Feedback input circuit is damaged.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
Digital 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 is set to 1 or 4.
Cause
Possible Solutions
Minor Fault
(H2-01 = 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.
Feedback sensor has malfunctioned.
Check the sensor and replace it if damaged.
Feedback input circuit is damaged.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
SIEP_C710636_02B_1_0.book 368 ページ 2015年11月25日 水曜日 午後4時56分