Control characteristic for direct and inverted control action
Field R236 offers two control characteristics
for selection which have the effects shown in
the following diagram.
5.5.3
Timer for cleaning function
This function can be used to implement a
simple cleaning routine. The user can specify
a time interval after which cleaning is to start;
i.e. only constant intervals
can be defined. There are other cleaning
functions in conjunction with the ChemoClean
function (version with four contacts, see
Chap. 5.5.4).
Note:
The timer and ChemoClean do not
work independently of each other.
Whilst one of the functions is active,
the other cannot be started.
X
X
– X
– X
w
w
w
w
100 %
100 %
Y
Y
direct =
max function
inverse =
min function
REGEL03.CDR
Fig. 5.11
Control characteristic of a
proportional-action
controller with direct and
inverse control action
Wiper and / or spray cleaning
system
active
inactive
Hold function
active
inactive
Cleaning time
(0 ... 999 s)
Pause time between
2 cleaning intervals
(1 ... 7200 min)
Clean-Hold
delay time
(0 ... 999 s)
Time
DIAGR-TI.CDR
Fig. 5.12
Relationship between
cleaning time, pause time
and hold delay time
OM23FE5B.CHP
Liquisys M COM 223 F / 253 F
Instrument configuration
Hauser
37
