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502 010 05
•
If the Output3 function is set as a regulator, the setpoint for the regulator is inserted
here. The setpoint is inserted in the same unit as the amount to be regulated - e.g.
3
m
/h.
•
If the Output2 function is set for Batch control, the setpoint for the batching is inserted
here. After batch start (via Input1 or BatchStart) Output2 will be ON until the volume
counter has reached the Setpoint. This function works for positive values only .
•
If the Output2 function is set as Limit switch, the limit is inserted in this register. If data
for the limit switch is below the limit, Output2 will be OFF. If data is above the limit,
Output2 will be ON.
As Setpoint may be used for Output2 as well as Output3, it is not possible to use the regu-
lator function for Output3 and either the batch control or limit switch function for Output2 at
the same time.
P-NET SWNo. 18: InstantFlow
This register shows the flow directly as it is measured in the transmitter.
•
The read out is not conditioned through the digital filter
•
Reverse flow is shown
•
Flowrates lower than 0.2% of maximum flow are shown
•
The actual flow is shown - even if the transmitter is in TEST-mode
6.1.2
Configuration and calibration parameters
P-NET SWNo. 20: MeterSize
The meter size, as shown on the meter head, is normally inserted in this register. On the
meter head, the meter size is stated in m
used for measurement results, the value of MeterSize should first be converted to the
equivalent in the new unit and then stored as the calibration factor. This value must always
be stated in volume units per hour - even if the required Flow read out is to be volume per
minute.
Example : On the meterhead the meter size is shown as 80 m
unit is litres, so insert 80 x 1000 = 80000 in MeterSize.
P-NET SWNo. 21: Ti
Ti is the integration time constant for the PI-regulator, which is the time it takes for the
I-component of the regulator to give the same change in the output signal as that made by
the P-component, following a permanent change of the input signal. If Ti is equal to 0, the
I-component of the regulator is disabled and set to zero.
See also the application example
Please consult the specialist literature on the subject of process control for further informa-
tion on how to set the regulator parameters for particular purposes.
32/55
PD 210 display address: E1, Size of Meter
3
/h. If another volumetric unit is required to be
PD 210 display address: E2, Integration time Ti
Flow
control.
Flow Transmitter, PD 340
PD 210 display key: "blank"
3
/h. The required volume
Manual
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