Yaskawa Z1000 AC Drive HVAC - Manual (Page 157)

No. Parameter Name Setting Range Default
b5-12 PI Feedback Loss Detection Selection 0 to 5 0
Setting 0: Digital Output Only (Remains active when PI is disabled by digital input)
A digital output set for “PI feedback low” (H2- = 3E) will be triggered if the PI feedback value is below the detection
level set to b5-13 for the time set to b5-14 or longer. A digital output set for “PI feedback high” (H2- = 3F) will be triggered
if the PI feedback value is beyond the detection level set to b5-36 for longer than the time set to b5-37. Neither a fault nor an
alarm is displayed on the HOA keypad and the drive will continue operation. The output resets when the feedback value leaves
the loss detection range. Detection remains active when PI is disabled by digital input (H1- = 19).
Setting 1: Feedback Loss Alarm (Remains active when PI is disabled by digital input)
If the PI feedback value falls below the level set to b5-13 for longer than the time set to b5-14, a “FBL - Feedback Low” alarm
will be displayed and a digital output set for “PI feedback low” (H2- = 3E) will be triggered. If the PI feedback value
exceeds the level set to b5-36 for longer than the time set to b5-37, a “FBH - Feedback High” alarm will be displayed and a
digital output set for “PI feedback high” (H2- = 3F) will be triggered. Both events trigger an alarm output (H1- = 10).
The drive will continue operation. The alarm and outputs reset when the feedback value leaves the loss detection range.
Detection remains active when PI is disabled by digital input (H1- = 19).
Setting 2: Feedback Loss Fault (Remains active when PI is disabled by digital input)
If the PI feedback value falls below the level set to b5-13 for longer than the time set to b5-14, a “FbL - Feedback Low” fault
will be displayed. If the PI feedback value exceeds the level set to b5-36 for longer than the time set to b5-37, a “FbH - Feedback
High” fault will be displayed. Both events trigger a fault output (H1- = E) and cause the drive to stop the motor. Detection
remains active when PI is disabled by digital input (H1- = 19).
Setting 3: Digital Output Only
A digital output set for “PI feedback low” (H2- = 3E) will be triggered if the PI feedback value is below the detection
level set to b5-13 for the time set to b5-14 or longer. A digital output set for “PI feedback high” (H2- = 3F) will be triggered
if the PI feedback value is beyond the detection level set to b5-36 for longer than the time set to b5-37. Neither a fault nor an
alarm is displayed on the HOA keypad and the drive will continue operation. The output resets when the feedback value leaves
the loss detection range. Detection is disabled when PI is disabled by digital input (H1- = 19).
Setting 4: Feedback Loss Alarm
If the PI feedback value falls below the level set to b5-13 for longer than the time set to b5-14, a “FBL - Feedback Low” alarm
will be displayed and a digital output set for “PI feedback low” (H2- = 3E) will be triggered. If the PI feedback value
exceeds the level set to b5-36 for longer than the time set to b5-37, a “FBH - Feedback High” alarm will be displayed and a
digital output set for “PI feedback high” (H2- = 3F) will be triggered. Both events trigger an alarm output (H1- = 10).
The drive will continue operation. The alarm and outputs reset when the feedback value leaves the loss detection range.
Detection is disabled when PI is disabled by digital input (H1- = 19).
Setting 5: Feedback Loss Fault
If the PI feedback value falls below the level set to b5-13 for longer than the time set to b5-14, a “FbL - Feedback Low” fault
will be displayed. If the PI feedback value exceeds the level set to b5-36 for longer than the time set to b5-37, a “FbH - Feedback
High” fault will be displayed. Both events trigger a fault output (H1- = E) and cause the drive to stop the motor. Detection
is disabled when PI is disabled by digital input (H1- = 19).
n b5-13: PI Feedback Low Detection Level
Sets the feedback level used for PI feedback low detection. The PI feedback must fall below this level for longer than the time
set to b5-14 before feedback loss is detected.
No. Name Setting Range Default
b5-13 PI Feedback Low Detection Level 0 to 100% 0%
n b5-14: PI Feedback Low Detection Time
Sets the time that the PI feedback has to fall below b5-13 before feedback loss is detected.
No. Name Setting Range Default
b5-14 PI Feedback Low Detection Time 0.0 to 25.5 s 1.0 s
n b5-15: PI Sleep Function Start Level
Sets the level that triggers PI Sleep/Snooze.
4.13 Advanced Drive Setup Adjustments
YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual 157
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Start-Up Programming & Operation