Ratio control
Ratio control
xxxx-FI-1 Total flow
Flow measurement FI-1 measures the total flow to the tank T3.
- Range 0…200 l/min
- Alarms:
- higher high not in use
- high limit 170 l/min
- lower low limit not in use
- low limit not in use
xxxx-FI-2 Flow from the pump P-2
Flow measurement FI-2 measures flow from the pump P-2.
- Range 0…120 l/min
- Alarms:
- higher high not in use
- high limit not in use
- lower low limit not in use
- low limit not in use
xxxx-LI-3 Tank T3 level
Level measurement LI-3 measures the level of the tank T3.
Measurement range 0…100 %
Alarm limits:
- Higher high not in use
- High 95 %
- Low not in use
- Lower low not in use
xxxx-HS-1 Shut-off valve from P-1
Shut-off valve HS-1 closes the flow from pump P-1.
M mode: The valve can be controlled by operator.
A mode: The valve is open when the Ready for start SS is chosen, and close when SS is not chosen.
Open and close limits do not exist.
xxxx-HS-2 Shut-off valve from P-2
Shut-off valve HS-2 closes the flow from pump P-2.
M mode: The valve can be controlled by operator.
A mode: A mode: The valve is open when the Ready for start SS is chosen, and close when SS is not chosen.
Open and close limits do not exist.
xxxx-HS-3 Shut-off valve to tank T2
Shut-off valve HS-3 opens the flow from the pump P-2 to the tank T2.
M mode: The valve can be controlled by operator.
A mode: The valve is close when the Ready for start SS is chosen, and open when SS is not chosen.
Open and close limits do not exist.
xxxx-FIC-1 Total flow controller
The controller controls the total flow to the tank T3 by the pump P-1. It uses the flow FI-1 as a measurement. The setpoin can be given from the display.
M mode: Operator can control valve 0...100%
A mode: The control is on
The controller goes to the auto mode (with pulse) after three seconds, when:
- Pump is P-1 is running
- Shut-off valve HS-1 is open
- Shut-off valve HS-2 is open
- Shut-off valve HS-3 is close
The output's range is 20...100 %.
Interlocks
- The output is forced to 20%, wen the pump P-1 is not running.
xxxx-FFIC-1 Ratio control
The controller controls a flow ratio from the pump P-2 to the total flow. It uses a calculated flow FI-2/FI-1 x 100 % as a measurement. The setpoin [%] can be given from the display.
M mode: Operator can control valve 0...100%
A mode: The control is on
The controller goes to the auto mode (with pulse) after three seconds, when:
- Pump is P-2 is running
- Shut-off valve HS-1 is open
- Shut-off valve HS-2 is open
- Shut-off valve HS-3 is close
The output's range is 0...100 %.
Interlocks
- The output is forced to 0%, wen the pump P-2 is not running.
xxxx-HC-2 Flow from tank T2
The loop controls the control valve LV-2.
M mode: Operator can control the valve 0...100%
A mode: Is not in use
Interlocks
- Not in use.
xxxx-LZ Level switches
Information to the other loops.
All the levels are OK, when:
Level switch LZ-1 is active (1), the level in T2 is not too high.
Level switch LZ-2 is active (1), the level in T3 is not too high.
Level switch LZ-3 is active (1), the level in T1 is not too low.
xxxx-P-1 Pump
The pump P-1 pumps the water from the tank T1 to the tank T3.
M mode: The operator can start and stop the pump
A mode: Is not in use
Interlocks
The pump can run, when:
- level switches LZ-1, LZ-2 and LZ-3 are active
- Emergency switch ES on display is not pushed
- Ready for running SS button is chosen on display
Motor current [A] and speed [rpm] are shown on display.
The speed of the pump is controlled by flow controller FIC-1.
xxxx-P-2 Pump
The pump P-2 pumps the water from the tank T1 to the tank T2 or T3.
M mode: The operator can start and stop the pump
A mode: Is not in use
Interlocks
The pump can run, when:
- level switches LZ-1, LZ-2 and LZ-3 are active
- Emergency switch ES on display is not pushed
- Ready for running SS button is chosen on display
Motor current [A] and speed [rpm] are shown on display.
The pump is running 100 %. It can not be controlled on display.
xxxx-SS Ready for Start button
Ready for Start button on the control display. The button sets the shut-off valves HS-1, HS-2 ja HS-3 to the right position and relases the interlocks for the pumps P-1 ja P-2.
1 = Ready for Start active
0 = Ready for Start inactive
xxxx-ES Emergency stop button
Emergency stop switch on the control display. Pressing the button interlocks the pumps P-1 and P-2.
1 = Emergency stop OFF
0 = Emergency stop ON