Yaskawa iQpump1000 AC Drive Quick Start - Manual (Page 226)

Lo w F eedba ck D etection
Standa rd Acting PID (b5-09 = 0)
Ou tpu t
F requen cy
Au to R un
C omm an d
PID
F eedba ck
“Lo w F eedba ck
Lo w F B Sen sed ”
Alarm & Lo w
F eedba ck D igital
Ou tpu t (H 2-0x = 97)
“LF B – Lo w
F eedba ck” F au lt
D uring
Pre-C ha rge
P1-09
Lo w LVL F lt T m
P1-09
Lo w LVL F lt T m
P1-09
Lo w LVL F lt T m
P1-08 – Lo w F B Le vel
Lo w F eedba ck Se l = F au lt (P 1-10 = 0)
P1-14
Figure 4.41 Low Feedback Detection Standard PID
Lo w F eedba ck D etection
Inverse PID (b5-09 = 1)
Ou tpu t
F requen cy
Au to R un
C omm an d
PID
F eedba ck
“Lo w F eedba ck
Lo w F B Sen sed ”
Alarm & D igital
Ou tpu t (H 2-0x = 97)
“LF B – Lo w
F eedba ck” F au lt
D uring
Pre-C ha rge
P1-09
Lo w LVL F lt T m
P1-08 – Lo w F B Le vel
Lo w F eedba ck Se l = F au lt (P 1-10 = 0)
P1-09
Lo w LVL F lt T m
P1-09
Lo w LVL F lt T m
P1-14
Figure 4.42 Low Feedback Detection Inverse PID
Setting 1: Alarm
When feedback drops below the P1-08 level for longer than the time set in P1-09, the digital output programmed to “Low
Feedback” (H2-0o = 97) closes and the drive displays the “Low Feedback – Low FB Sensed” alarm.
When feedback rises above the level determined by P1-08 and P1-14, or when one or more of the conditions that enable low
feedback detection are no longer true, the digital output will open and the alarm will clear.
Setting 2: Digital out only
When feedback drops below the P1-08 level for longer than the time set in P1-09, the digital output programmed to “Low
Feedback” (H2-0o = 97) closes.
When feedback rises above the level determined by P1-08 and P1-14, or when one or more of the conditions that enable low
feedback detection are no longer true, the digital output will open.
4.6 Basic iQpump Setup and Application Preset Parameters
226 YASKAWA TOEP YAIP1W 01B YASKAWA AC Drive - iQpump1000 Quick Start Guide