3 10 Pump Control
3 10 Pump Control
Pump Control function is one of the unique features of FDC-9300. Using this
function the pressure in a process can be controlled excellently. The
pressure in a process is commonly generated by a pump driven by a
variable speed motor. The complete system has the following
which affects the control behavior: , The system is very
noisy. , The pressure is changed very rapidly. , The pump characteristics is
ultra nonlinear with respect to its speed. , The pump can't generate any
more pressure as its speed is lower than half of its rating speed. , An
ordinary pump may slowly lose the pressure even if the valves are
characteristics
1
2
3
4
5
Pump Control function is one of the unique features of FDC-9300. Using this
function the pressure in a process can be controlled excellently. The
pressure in a process is commonly generated by a pump driven by a
variable speed motor. The complete system has the following
which affects the control behavior: , The system is very
noisy. , The pressure is changed very rapidly. , The pump characteristics is
ultra nonlinear with respect to its speed. , The pump can't generate any
more pressure as its speed is lower than half of its rating speed. , An
ordinary pump may slowly lose the pressure even if the valves are
characteristics
1
2
3
4
5
Obviously a conventional controller can't fulfill the conditions mentioned
above. Only the superior noise rejection capability in addition to the fast
sampling rate owned by FDC-9300 can realize such application. To
achieve this, set the following parameters in the setup menu:
Obviously a conventional controller can't fulfill the conditions mentioned
above. Only the superior noise rejection capability in addition to the fast
sampling rate owned by FDC-9300 can realize such application. To
achieve this, set the following parameters in the setup menu:
FUNC=FULL
EIFN=NONE
PVMD=PV1
FILT=0.5
SELF=NONE
SPMD=PUMP
SP2F=DEVI
FUNC=FULL
EIFN=NONE
PVMD=PV1
FILT=0.5
SELF=NONE
SPMD=PUMP
SP2F=DEVI
Key menu
Key menu
SPMD
SP2F
REFC
SP2
SPMD
SP2F
REFC
SP2
and program the following parameters in the user menu:
and program the following parameters in the user menu:
REFC= Reference constant
SP2= A negative value is added to SP1 to obtain the set point for idle
state
REFC= Reference constant
SP2= A negative value is added to SP1 to obtain the set point for idle
state
Since the pump can't produce any more pressure at lower speed, the
pump may not stop running even if the pressure has reached the set point.
If this happens, the pump will be over worn out and waste additional
power. To avoid this, the FDC-9300 provides a
in
the user menu. If PUMP is selected for SPMD, the controller will periodically
test the process by using this reference constant after the pressure has
reached its set point.
If the test shows that the pressure is not consumed by the process,
the controller will gradually decrease the power to the pump until the
pump stops running. As this happens, the controller enters
. The
idle state will use a lower set point which is obtained by adding SP2 to SP1
until the pressure falls below this set point. The idle state is provided for the
purpose of preventing the pump from been restarted too frequently. The
value of SP2 should be
to ensure a correct function.
Reference Constant REFC
idle state
negative
If the test shows that the pressure is still consumed by
the process, the controller will continue to supply appropriate power to the
pump.
Since the pump can't produce any more pressure at lower speed, the
pump may not stop running even if the pressure has reached the set point.
If this happens, the pump will be over worn out and waste additional
power. To avoid this, the FDC-9300 provides a
in
the user menu. If PUMP is selected for SPMD, the controller will periodically
test the process by using this reference constant after the pressure has
reached its set point.
If the test shows that the pressure is not consumed by the process,
the controller will gradually decrease the power to the pump until the
pump stops running. As this happens, the controller enters
. The
idle state will use a lower set point which is obtained by adding SP2 to SP1
until the pressure falls below this set point. The idle state is provided for the
purpose of preventing the pump from been restarted too frequently. The
value of SP2 should be
to ensure a correct function.
Reference Constant REFC
idle state
negative
If the test shows that the pressure is still consumed by
the process, the controller will continue to supply appropriate power to the
pump.
The pump functions are summarized as follows:
1. If the process is demanding material ( ie. lose pressure ), the controller
will precisely control the pressure at set point.
2. If the process no longer consumes material, the controller will shut off the
pump as long as possible.
3. The controller will restart the pump to control the pressure at set point as
soon as the material is demanded again while the pressure falls below a
predetermined value ( ie. SP1+SP2 ).
The pump functions are summarized as follows:
1. If the process is demanding material ( ie. lose pressure ), the controller
will precisely control the pressure at set point.
2. If the process no longer consumes material, the controller will shut off the
pump as long as possible.
3. The controller will restart the pump to control the pressure at set point as
soon as the material is demanded again while the pressure falls below a
predetermined value ( ie. SP1+SP2 ).
Pump Control Features:
Pump Control Features:
1. Minimum oscillation of pressure
2. Rapidly stabilized
3. Guaranteed pump stop
4. Programmable pump stopping
interval
1. Minimum oscillation of pressure
2. Rapidly stabilized
3. Guaranteed pump stop
4. Programmable pump stopping
interval
PUMP: A Cost Effective
yet Perfect Solution
PUMP: A Cost Effective
yet Perfect Solution
35
UM9300 2.0
UM9300 2.0
