Coding
Field
Selection or range
Factory setting (bold)
Display
Info
Z
Function group
CURRENT INPUT
Initial display in
function group
CURRENT INPUT.
Z1
Select flow rate
monitoring of main
stream (with
controller
switch-off)
Off
Input
Only switch on when flow meter
is connected in main stream.
When Z1 = Off, fields Z2 to Z5 do
not exist.
Z2
Enter delay for
controller
switch-off by
current input
0 s
0 ... 2000 s
Short-term flow rate undershots
can be suppressed by delay and
will not cause controller
switch-off.
Z3
Enter delay for
controller
switch-on by
current input
0 s
0 ... 2000 s
With oxygen monitoring, a delay
up until reception of a
representative measured value is
preferred after a long flow rate
failure.
Z4
Enter switch-off
threshold for
current input
50%
0 ... 100%
0 … 100% corresponds to
4 … 20 mA at current input. Note
the measured value allocation to
the current output of the flow
meter.
Z5
Select orientation
stop for current
input
Low
High
If the value entered in Z4 is
exceeded low or high, the
controller switches off.
Z6
Select
feedforward
control for PID
controller
Off
lin = linear
When Z6 = Off, Z7 does not exist.
Basic = Feedforward control only
affects the basic load
(alternatively dosage in
proportion to quantity, if common
PID control is not possible, e.g.
due to sensor defect)
Z7
Enter value for
feedforward
control at which
modulation gain
= 1
50%
0 ... 100%
When the value is set, the
controller manipulated value with
feedforward control on is
identical to feedforward control
off.
Z
CUR.INPUT
Z1
Cont.stop
Off
Z2
s
Off Delay
0
Z3
s
On Delay
0
Z4
%
A.Thresh
50
Z5
Stop Dir
Low
Z6
PID influ
Off
Z7
%
Kinflu=1
50
The factory settings are printed in bold; functions printed in
italics are not available in the basic version.
OM253FE5A.CHP
Liquisys M COM 223 F / 253 F
Instrument configuration
Hauser
27
