Timer Function; Helpful Hints - Pentair Pentek Series Electronic Manual

SECTION 9: PPC Series 50/60 Hz Variable Frequency Drives
9.7

Timer Function

The Pentek PPC Series controller includes four timer
®
functions. Each timer function can include up to four daily
/ weekly start and stop times.
The following example show the parameter changes
required to use PID Set 2 on Monday, Wednesday, and
Friday from 8:00AM to 10:00AM.
Parameter
3601 – Timers Enable . . . . . . . . . . . . . . . . . . 7 – Enabled
3602 – Start Time 1 . . . . . . . . . . . . . . . . . . . . . . . 8:00AM
3603 – Stop Time 1 . . . . . . . . . . . . . . . . . . . . . . . 10:00AM
3604 – Start Day 1 . . . . . . . . . . . . . . . . . . . . . . 1-Monday
3605 – Stop Day 1 . . . . . . . . . . . . . . . . . . . . . . . 1-Monday
3606 – Start Time 2 . . . . . . . . . . . . . . . . . . . . . . . 8:00AM
3607 – Stop Time 2 . . . . . . . . . . . . . . . . . . . . . . . 10:00AM
3608 – Start Day 2 . . . . . . . . . . . . . . . . . . . 3-Wednesday
3609 – Stop Day 2 . . . . . . . . . . . . . . . . . . . 3 – Wednesday
3610 – Start Time 3 . . . . . . . . . . . . . . . . . . . . . . . 8:00AM
3611 – Stop Time 3 . . . . . . . . . . . . . . . . . . . . . . . 10:00AM
3612 – Start Day 3 . . . . . . . . . . . . . . . . . . . . . . . . 5-Friday
3612 – Stop Day 3 . . . . . . . . . . . . . . . . . . . . . . . . . 5-Friday
3626 – Timer Func1SCR . . . . . . . . . . . . 7 = P3 +P2 + P1
4027 – PID 1 Param Set . . . . . . . . . 8 = Timer Function 1
9.8

Helpful Hints

Alarm 2025 upon startup
This is a normal alarm, and occurs whenever motor data
is changed. The alarm shows for about 15 seconds while
the drive performs a motor calibration.
Fault 14 External Fault 1
External fault 1 is triggered when the VFD's output
frequency exceeds motor nameplate frequency for more
than 10 seconds. The ON delay parameter controls
the time delay for this fault. If the system includes a
large tank, or requires more time to reach the setpoint,
increase parameter 1404 (PPC5) or 1806 (PPC3).
This fault is designed to protect against loss of prime,
broken shafts, etc. To disable this fault, adjust parameter
2002 Maximum speed, to the motor nameplate rpm.
Sleep
The Pentek drive monitors pump speed to determine
demand. The pump is shut off when the rpm goes below
parameter 4023: PID Sleep Level. Always set parameter
4023 high enough to trigger sleep mode during low
demand conditions. Note that the shut-off head at
parameter 4023: RPM, must be higher than the pressure
set-point.
76
The pressure setpoint can be determined by slowly
closing the discharge valve to confirm that the RPM
decreases to a level that triggers the sleep mode. The
discharge head can also be found by using the BEC2
program on the BEC2.net website.
Systems that use small tanks, or have a flat performance
curve, may cycle rapidly at intermediate flows. Correct
this by increasing Parameter 4024: PID Sleep Delay.
Setting
DO NOT increase parameter 4024 to a level that will
cause the pump to run with no demand. The water in the
pump can overheat.
Sleep Options
Other devices such as flow or float switches can be used
to trigger sleep mode. Parameter 4022 determines the
method to trigger sleep mode. These options can be used
for pump up, pump down, and other on/off applications.
Multiple Systems / Setpoints
The Pentek PPC Series Controller includes (2)
independent process control sets (groups 40 and 41).
Group 41 parameters can be selected using Digital Input
(DI3). When first set-up, groups 40 and 41 are identical.
A set can be changed later with parameters for a
second process.
Constant Flow
After running the Pentek Assistant, the drive can be
configured for constant flow by adjusting parameters
4006: Units, and 4009: 100% Value.
Constant Flow Example 1:
Using a 4-20ma velocity meter with a range of
0 to 10 ft/sec. We want the display to be ft/sec.
Set 4006 to ft/sec
Set 4009 to 10
Constant Flow Example 2:
Same setup as example 1, but we have a 4" pipe and want
the display to be gpm.
Set 4006 to gpm
Set 4009 to 393 (this is the flow in a 4" pipe which results
in a 10 ft/sec velocity).
Constant Flow Example 3:
Using a 4-20ma flow meter with a range of 0 to 100 gpm.
We want the display to be gpm.
Set 4006 to gpm
Set 4009 to 100