9
ON/OFF controlling of cooling is set with the parameter
ot2
=
CL2
. Parameter
ot2
is found in
configuration level
, menu
out2
.
STP value for cooling is put down by the value set with parameter
SP2
, that is found
in
configuration level
, menu
out2
.
In
operation level
you set hysteresis of ON/OFF controlling, parameter
hYS2
.
Cooling, PID controlling
PID controlling of cooling is set with parameter
ot2
=
CL
. Parameter
ot2
is found in
configuration level
, menu
out2
.
STP value for cooling is put down by the value set with parameter
SP2
, that is found
in
configuration level
, menu
out2
.
In
operation level
you set PID parameters:
•
Pb2A
,
It2A
,
dE2A
, PID parameters defines the response of the controller.
4.4
Autotunning – automatic setting of PID parameters
The controller is fitted with the function that sets automatically PID parameters.
Autotunning of PID parameters can be started only when the controller maintains stp value SP1 (parameter
L-r
=
L
)
Procedure of starting autotunning:
•
Autotunning you can start with parameter
Aut
=
ht
(setting parameters for heating) or
Aut
=
CL
(setting parameters
for cooling). Parameter
Aut
you will find in
operation level.
The control output must be set for PID controlling.
•
The controller explores the characteristics of system from switching ON/OFF on the output and determines optimal PID
parameters. It can cause an overshoot.
•
In the course of autotunning on lower display the information messages (
Aut1
,
Aut2
,
Aut3
) blink.
•
After the autotunning is finished the parameters are edited and the information messages stop blinking.
Important:
•
Parameters
Pb1A
,
It1A
,
dE1A
, are set when 1 set of PID parameters is used (
ALGo
=
PId
) or the both sets of PID parameters
are used (
ALGo
=
2PId
) and the actual set point value is lower than parameter
SPId
.
•
Parameters
Pb1b
,
It1b
,
dE1b
, are set if the actual set point value is higher than parameter
SPId
when the both sets of PID
parameters are used (
ALGo
=
2PId
)
Parameters
ALGo
and
SPId
are found in
configuration level
, menu
out1
.
Start
of
autotunning
End
of
autotunning
When in autotunning, on lower there are the following headings
blinking:
•
Aut1
… the controller adjusts parameters
Pb1A
,
It1A
,
dE1A
for heating.
•
Aut2
… the controller adjusts parameters
Pb1b
,
It1b
,
dE1b
for heating.
•
Aut3
… the controller adjusts parameters
Pb2A
,
It2A
,
dE2A
for cooling.
hYS2
SP1 + SP2
SP1 + SP2