OPERATION
Control Options
69
Pipe Fill Timer [SET–33]:
Pipe Fill mode exit timer to switch to PID control.
•
Enter a time between 0.1 and 60 minutes to allow the pipe system to fill.
•
If set to 0.0, Pipe Fill is disabled.
•
When the timer expires, the VFD cancels Pipe Fill mode and switches to PID control, regardless of
whether [SET–34] pressure has been reached.
Pipe Fill Exit Level [SET–34]:
Pipe Fill mode exit pressure to switch to PID control.
•
Enter a pressure setting between 0 and the PID Setpoint [SET–21] (default = 25 psi).
•
During Pipe Fill mode, if pressure reaches the set value, VFD switches to PID control.
Pipe Fill Freq [SET–35]:
Pipe Fill mode High frequency limit setting.
•
Range is between PID Low Freq Limit [SET–22] and PID Hi Hz Limit [SET–23] (default = 47 Hz).
•
The Pipe Fill mode frequency should be equal to or greater than [SET–22] +2 Hz to provide enough sys
-
tem pressure at the end of pipe fill mode to switch to PID control.
Upon start, if system pressure is less than [SET–34], VFD will ramp up to Low Freq Limit + 2 and start pipe fill
mode.
•
If system pressure is less than 0.5 x [SET–34], the frequency reference will be increased at a rate of 0.5
Hz per second.
•
If system pressure is equal to or greater than 0.5 x [SET–34] but less than 0.6 x [SET–34], the frequency
reference will stay at the current value.
•
If system pressure is equal to or greater than 0.6 x [SET–34] but less than [SET–34]
setting, the fre
-
quency reference will be decreased at a 0.5Hz per second rate. However, the rate will not be decreased
below PID Low Hz Limit [SET–22] +2 Hz.
•
If at any point system pressure is equal to or greater than [SET–34], VFD will cancel Pipe Fill mode and
switch to PID control.
Lubrication Relay
The VFD has the capability to automatically activate a lubrication solenoid for line shaft turbine pumps, or
for industrial machines with an external lubrication supply, before starting the motor.
Timers are available to enable lubrication before, during, or after running the motor, in any combination.
To enable the lubrication function, set the following parameters:
Lubrication Output Terminal [IO–47 through 49]:
Connect the lubrication actuator to one of the Relay
Outputs (RA1–3), and set the corresponding parameter to
41 Lube/S-Clean
.
Lube/S-Clean [IO–41]:
Select the
Lubrication
option.
Pre-Lube Timer [IO–43]:
0 to 6000 seconds. This setting determines relay activation time after a run com
-
mand is received and before the VFD starts. When the timer expires, the lubrication solenoid will be deacti
-
vated and the VFD will start the motor. If a stop command is received, or the VFD trips during Pre-
lubrication, the relay will be deactivated and the timer accumulated value will be reset.
Run-Lube Timer [IO–44]:
0 to 6000 seconds. This setting determines relay activation time while the VFD
is running.
•
When set to a value greater than 0 and less than 6000, the relay will be activated at VFD start and will
deactivate when the timer expires. If the VFD stops while the timer is active, the relay will deactivate
and the timer will be reset.
•
If the timer is set to the maximum 6000 sec, the relay will be activated during run mode until the VFD
stops (no timing). If the VFD stops or trips, the relay will deactivate.
Post-Lube Tmr [IO–45]:
0 to 6000 seconds. This setting determines relay activation time after the VFD
comes to a stop (0 Hz).
Содержание Cerus X-Drive
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