Burkert 8630 Instructions De Service page 136

P.CO SCAL
Scale limit for process control by selection of
A)
(example see below)
Scale limit selection example for the 4..20 mA input (Fig. 6.16):
Actual process value of the transmitter:
Process setpoint of the SPS:
Scale limit
[l/min]
On entry of small scaling values, to increase the display accuracy, places after the decimal point are
NOTE
automatically added, so that the maximum possible digit range is obtained between the lower and upper
scaling value in each case.
The amplification (KP) of the process controller relates to scale values set.
With
not possible. It can be entered directly in correspondence with the scaled process variable (
Top Control Continuous
4..20 mA match 0..10 l/min
4..20 mA match 0..8 l/min
Process
value
Process
setpoint
Input signal
Fig 6.16: Example of scale limit for controller input
[mA]
(desired value pre-set via the arrow key), no scaling of the desired value
"4 ..20 mA" (P.CO inp 4-20A)
Position of the decimal point for the process setpoint and
actual value
(Selectable value: 0..3)
Lower range value for process actual value
(process value);
value assigned to 4 mA.
Higher range value for process actual value
(process value);
value assigned to 20 mA.
Lower range value for process setpoint
(setpoint); assigned to the highest current/voltage value
of the external setpoint signal.
This setting is only activated if
is selected.
Higher range value for process setpoint
(setpoint); assigned to the lowest current/voltage value
of the external setpoint signal.
This setting is only activated if
selected.
Example for scale value entries
Variant 1 Variant 2
PV 0 0
PV 1.0 10.0
SP 0 0
SP 0.8 8.0
is
Variant 3
0
100.0
0
80.0
and
, ).
135