YASKAWA GA700 Technical Manual page 626

11.3 b: Application
This parameter is disabled when b5-01 = 3, 4 [PID Function Setting = Fref+PID D=Fdbk, Fref+PID D=Fdfwd].
There is no limit for PID output (PID output can be positive or negative). Operates the same as setting "1:
Enabled: Negative lower limit."
0 : Disabled: 0 lower limit
Limits the PID output to zero when PID output is negative and shuts off drive output.
1 : Enabled: Negative lower limit
Rotates the motor in reverse when the PID output is negative.
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b5-12: Feedback Loss Detection Select
No.
Name
(Hex.)
b5-12 Feedback Loss
Detection Select
(01B0)
0 : No alarm_Always detected_DO only
Triggers the multi-function digital output terminal set for PID Feedback Low or PID Feedback High [H2-01 to
H2-04 = 3E, 3F]. The keypad will not display an alarm when triggered. The drive continues operation.
The drive triggers the multi-function digital output set for a PID Feedback Low when the feedback signal falls
below 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 drive triggers the multi-function digital output set for a PID Feedback High when the feedback signal exceeds
the level set in b5-36 [PID Feedback High Detection Lvl] for longer than the time set in b5-37 [PID Feedback
High Detection Time].
The drive resets the fault output when the feedback value is no longer within the detection range.
1 : Alarm_Always detected
Detects FbL [PID Feedback Loss] and FbH [Excessive PID Feedback]. Triggers the multi-function digital output
terminal set for PID Feedback Low or PID Feedback High [H2-01 to H2-04 = 3E, 3F]. The output terminal set
for Minor Fault [H2-01 to H2-04 = 10] switches ON. The drive continues operation.
The drive triggers the multi-function digital output set for a PID Feedback Low when the feedback signal falls
below the level set in b5-13 for longer than the time set in b5-14.
The drive triggers the multi-function digital output set for a PID Feedback High when the feedback signal rises
above the level set in b5-36 for longer than the time set in b5-37.
The drive resets the alarm output when the feedback value goes outside the detection range.
2 : Fault_Always detected
Detects FbL and FbH. The output terminal set for Fault [H2-01 to H2-04 = E] switches ON. The motor coasts to
stop.
The drive detects FbL when the feedback signal falls below the level set in b5-13 for the time set in b5-14.
The drive detects FbH when the feedback signal rises above the level set in b5-36 for the time set in b5-37.
3 : No alarm_only @ PID enbl_DO only
Triggers the multi-function digital output terminal set for PID Feedback Low or PID Feedback High. The keypad
will not display an alarm when triggered. The drive continues operation.
The drive disables fault detection when the multi-function digital input terminal set to PID Disable [H1-xx = 19]
switches ON.
4 : Alarm_only detected @ PID Enbl
Detects FbL and FbH. Triggers the multi-function digital output terminal set for PID Feedback Low or PID
Feedback High. The output terminal set for Minor Fault [H2-01 to H2-04 = 10] switches ON. The drive
continues operation.
The drive disables fault detection when the multi-function digital input terminal set to PID Disable [H1-xx = 19]
switches ON.
5 : Fault_only detected @ PID Enbl
Detects FbL and FbH. The output terminal set for Fault [H2-01 to H2-04 = E] switches ON. The motor coasts to
stop.
626
V/f CL-V/f OLV CLV AOLV
Enables or disables PID feedback loss detection. Sets operation after the
drive detects PID feedback loss.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default Setting
(Range)
0
(0 - 5)