YASKAWA HV600 Manual page 218

2.3 b: Application
b5-83:
b5-85:
b5-86:
H2-xx = B9:
Backup PID Feedback Transducer Input
When you set H3-xx = 24 [MFAI Function Selection = PID Feedback Backup], the drive will activate the PID
Feedback Backup signal.
• If the primary PID Feedback (H3-xx = B [PID Feedback]) is lost, the system will automatically use the backup PID
Feedback from the MFAI terminal set for H3-xx = 24 and flash a Bu-Fb [Main Fdbk Lost Using Backup Fdbk]
alarm.
• If the main PID Feedback is operational, but the backup PID Feedback is lost, the drive will show a BuFbl [Backup
Fdbk Lost Chk/Repl Xducer] alarm. If the main and backup PID Feedback devices are lost, the drive will use the
b5-82 [Feedback Loss 4～20mA Detect Sel] setting.
Note:
To enable the FDBKL [WIRE Break] detection correctly, use a 4 to 20 mA operation in these conditions:
• Use a 4 to 20 mA signal for transducers.
• Program the drive analog inputs and set Jumper Switch S1 to "I" for current input.
If you set the analog input for voltage, the drive will disable the detection mechanism.
■
b5-83: Feedback Loss GoTo Frequency
No.
Name
(Hex.)
b5-83 Feedback Loss GoTo
Frequency
(31B1)
RUN
Note:
When A1-02 = 8 [Control Method Selection = EZ Vector Control], the range is 0.0 to 120.0 Hz.
■
b5-84: Feedback Loss Loss Of Prime Lvl
No.
Name
(Hex.)
b5-84 Feedback Loss Loss Of
Prime Lvl
(31B2)
RUN
218
Figure 2.30 Time Chart for the Wire Break Detection when b5-82 = 3
V/f OLV/PM EZOLV OLV/PM
Sets the speed at which the drive will run if the drive detects a 4 to 20 mA wire-break on the PID
Feedback and b5-82 = 3 [Feedback Loss 4～20mA Detect Sel = Run At b5-83].
V/f OLV/PM EZOLV OLV/PM
Sets the level at which the drive will detect Loss of Prime in the pump.
H3-xx = B:
FDBKL Fault:
FLGT Alarm:
Description
Description
YASKAWA TOEPYAIHV6002A HV600 Drive Programming
Default
(Range)
0.0 Hz
(0.0 - 400.0 Hz)
Default
(Range)
0.0 A
(0.0 - 1000.0 A)