4.2
Configuration parameters
Configuration level
Operating manual MIR-491
23
Configuration parameters
Cntr
Name
Value range Description
Default
SP.Fn
Basic configuration of setpoint processing
0
0
set-point controller can be switched over to external set-point
(->
LOGI
/
SP.E
)
8
standard controller with external offset (
SP.E
)
C.tYP
Calculation of the process value
0
0
standard controller (process value = InP.1)
1
ratio controller (InP.1/X2)
2
difference (InP.1 - X2)
3
Maximum value of InP.1and X2. It is controlled with the
bigger value. At sensor failure it is controlled with the
remaining actual value.
4
Minimum value of InP.1and X2. It is controlled with the
smaller value. At sensor failure it is controlled with the
remaining actual value.
5
Mean value (InP.1, X2). With sensor error, controlling is
continued with the remaining process value.
6
Switching between InP.1 and X2 (->
LOGI
/
I.ChG
)
C.Fnc
Control behaviour (algorithm)
1
0
on/off controller or signaller with one output
1
PID controller (2-point and continuous)
2
∆
/ Y / Off, or 2-point controller with partial/full load
switch-over
3
2 x PID (3-point and continuous)
4
3-point stepping controller
5
3-point stepping controller with position feedback Yp
6
continuous controller with integrated positioner
mAn
Manual operation permitted
0
0
no
1
yes (
r
LOGI
/
mAn
)
C.Act
Method of controller operation
0
0
inverse, e.g. heating
1
direct, e.g. cooling
FAIL
Behaviour at sensor break
1
0
controller outputs switched off
1
y = Y2
2
y = mean output. The maximum permissible output can be
adjusted with parameter
Ym.H
. To prevent determination of
inadmissible values, mean value formation is only if the
control deviation is lower than parameter
L.Ym
.
