User manual - CONTROLLER PUR-94D
Figure 6.5. The general structure of the
device
Figure 6.6. General scheme of the PID controller implemented in the
device
Depending on the operating mode, the regulators can operate as shown in
:
Figure 6.7. Relay control characteristics depending on the operating mode
24
FuZL
Setpoint
SEtP
inPt
Controlled
object
Measurement
input
Fuzzy logic block
Feedback
Fuzzy
setpoint
PID H
PID C
Modbus
Master
Sour
modE
Out.: rELx/OCx
OSou
Omod
Analogue
output
LooP
Err
1
P
-H
P
-C
t
I
-H
t
I
-C
t
d
-H
t
d
-C
dEAd
InEr
Dead zone
Proportional
block
Integral
block
Derivative
block
Inertial
block
Feedback
Output
limits
Setpoint
SEtP
or
Fuzzy
setpoint
Upper limit
Hi-H
Hi-C
Lower limit
Lo-H
Lo-C
Offset
OF-H
OF-C
t
SetPoint
Input
ON
OFF
O
F
F
S
PID H
t
SetPoint
Input
OFF
ON
O
F
F
S
PID C
