Chapter 6 - Parameter Description
6-6
SET PrePID Freq
36 37.00 Hz
SET PrePID Dly
37 180 sec
SET PrePID Exit
38 25.0 PSI
SET PBroken Freq
41 59.00 Hz
SET PBroken Dly
42 30 sec
SET PBroken F/B
43 50.0 PSI
should be set high enough to increase system
pressure above set point. When the system pressure
is increased above set point by SET-34 value, the
VFD will switch to Sleep mode and stop based on
SET-16 stop mode.
).7+
9 '
&
The SET-35 Wake
up level is a percentage
of SET-25 Maximum Feedback Unit value.
Wakeup
PSI Value=
[SET-26]-
!"#$% &'(!)#$
(**
+
The VFD will wake up and run on PID control
when feedback value falls below Wakeup PSI
Value.
).06 .36 .4+ " ) $
" 2' ! 6
!
:
The Pre-PID mode is used to fill empty pipes at
initial start of the system. When SET-36 is changed
from 0Hz to any value, the Pre-PID mode and
parameters are enabled. When VFD receives a start
signal, the PID is disabled and VFD ramps up to
SET-36 speed based on SET-11 ACC time. This
speed should be high enough to provide good water
flow to fill pipes slowly increasing a system
pressure. The VFD will switch to PID control when
SET-37 time delay is expired or system pressure
becomes greater than SET-38 Pre-PID exit level.
)/*+
;" 9 !
The SET-40 parameter
enables Pipe Broken
Mode. The VFD will determine if pipe is broken by
monitoring the output speed and feedback signal.
When SET-40 is set to Yes, Broken Pipe
parameters SET-41~44 become available. See
diagram on page 7-3 for Pipe Broken mode
operation.
)/ 6 / 6 /.+
;" 9 ! " 2' ! 6
!
8 9
During normal operation when VFD runs with PID
control at high demand and feedback is below set
point, the VFD will increase speed and then when
demand is satisfied the speed will be decreased to
some level. When any pipe in the system is broken,
the VFD will continuously run pump at full speed
trying to satisfy the demand. If VFD runs above
SET-41 Pipe Broken Frequency for more than SET-
42 Pipe Broken Delay and the feedback signal level
is below SET-43 Pipe Broken Feedback, the VFD
will trip on Pipe Broken Fault. This fault can be
reset by pressing the Stop key on VFD keypad, by
enabling a digital Reset input, or by recycling VFD
input power.
)//+
;" 9 !
The SET-44 parameter
has three selections:
None, AUX-3 and AUX-4. The SET-44 parameter
enables a selected AUX-3 or AUX-4 relay output to
indicate a Pipe Broken Fault.
)7*+ ' )
" 1 ! "
<
1=
The SET-50 parameter
enables Multi-Motor
Control parameters and Lead-Lag Control, which
allows to control up to four Lag motors. The VFD
will control the speed of the lead motor based on
internal PID control and provide start/stop relay
outputs for Lag motor starters, Soft starts or VFDs.
The MMC mode can be used to start and stop
auxiliary motors at programmed output speeds
when PID is disabled.
)7 + ' 8 " >
"
! "
8
1
The SET-51 parameter
allows selecting the
number of Lag AUX motors from 0 to 4. The Lag
motors start and stop sequence depends on the
settings in parameters APP-41~45.
SET WakeUp Level
35 2%
SET PBrokenMode
40 Yes
SET PBrokenRelay
44 AUX-3
SET MMC Mode
50 Yes
SET Nbr Aux’s
51 1
Summary of Contents for CI-007-P2
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Page 107: ......
Page 110: ...Chapter 6 Parameter Description 7 4 PID control with Pipe Broken function diagram...
Page 111: ...Chapter 6 Parameter Description 7 4 7 5 PID control with Pre PID function diagram...
Page 112: ...Chapter 6 Parameter Description 7 5 7 6 PID Control Setting Notes...
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