12.3 b: Application
676 YASKAWA SIEPC71061705H GA700 Series Technical Manual
■ b5-12: Feedback Loss Detection Select
No.
(Hex.)
Name Description
Default
(Range)
b5-12
(01B0)
Feedback Loss Detection
Select
Sets the drive response to PID Feedback Low/High. Sets drive operation after the drive detects
PID feedback Low/High.
0
(0 - 5)
0 : Digital Out Only, Always Detect
The MFDO terminal set for PID Feedback Low or PID Feedback High [H2-01 to H2-03 = 3E, 3F] activates.
When the drive detects Feedback Low/High, the keypad will not show a minor fault/alarm and the drive will
continue operation.
When the feedback signal is less than the level set in b5-13 [PID Feedback Loss Detection Lvl] for longer than
the time set in b5-14 [PID Feedback Loss Detection Time], the MFDO terminal set for a PID Feedback Low
activates.
When the feedback signal is more than the level set in b5-36 [PID High Feedback Detection Lvl] for longer than
the time set in b5-37 [PID High Feedback Detection Time] the MFDO terminal set for a PID Feedback High
activates.
When the feedback value is not in the detection range, the drive resets the MFDO.
1 : Alarm + Digital Out, Always Det
The drive detects FbL [PID Feedback Loss] and FbH [Excessive PID Feedback]. The MFDO terminal set for
PID Feedback Low or PID Feedback High [H2-01 to H2-03 = 3E, 3F] activates. The output terminal set for
Alarm [H2-01 to H2-03 = 10] activates and the drive continues operation.
When the feedback signal is less than the level set in b5-13 for longer than the time set in b5-14, the MFDO
terminal set for a PID Feedback Low activates.
When the feedback signal is less than the level set in b5-36 for longer than the time set in b5-37, the MFDO
terminal set for a PID Feedback High activates.
When the feedback value is not in the detection range, the drive resets the MFDO.
2 : Fault + Digital Out, Always Det
The drive detects FbL and FbH. Fault relay output terminal MA-MC activates, MB-MC turns OFF, and the motor
coasts to stop.
When the feedback signal is less than the level set in b5-13 for the time set in b5-14, the drive detects FbL.
When the feedback signal is less than the level set in b5-36 for the time set in b5-37, the drive detects FbH.
3 : Digital Out Only, @ PID Enable
The MFDO terminal set for PID Feedback Low or PID Feedback High activates. The keypad will not show a
minor fault/alarm. The drive continues operation.
When the MFDI terminal set to PID Disable [H1-xx = 19] activates, the drive disables fault detection.
4 : Alarm + Digital Out, @PID Enable
The drive detects FbL and FbH. The MFDO terminal set for PID Feedback Low or PID Feedback High activates.
The output terminal set for Alarm [H2-01 to H2-03 = 10] activates and the drive continues operation.
When the MFDI terminal set to PID Disable [H1-xx = 19] activates, the drive disables fault detection.
5 : Fault + Digital Out, @PID Enable
The drive detects FbL and FbH. Fault relay output terminal MA-MC activates, MB-MC turns OFF, and the drive
coasts to stop.
When the MFDI terminal set to PID Disable [H1-xx = 19] activates, the drive disables fault detection.
■ b5-13: PID Feedback Loss Detection Lvl
No.
(Hex.)
Name Description
Default
(Range)
b5-13
(01B1)
PID Feedback Loss
Detection Lvl
Sets the level that triggers PID Feedback Loss [FbL] detection as a percentage of the Maximum
Output Frequency.
0%
(0 - 100%)
The drive detects PID Feedback Loss [FbL] when the feedback signal decreases to less than the level set in b5-13
for longer than the time set in b5-14 [PID Feedback Loss Detection Time].
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