Moeller DF51 - Configuring PID Control

Setting parameters
10/05 AWB8230-1541GB
134
Configuring PID control
Actual value
Process variable (PV) feedback requires an analog input:
• Voltage signal: 0 – 10 V H a input O or
• Current signal: 4 20 mA a input OI.
The selection is made with PNU A076 and also assigns the other,
previously unassigned, analog input as reference value input (if
PNU A001 = 01).
Reference value
The analog reference value input is automatically assigned
through the selection of the analog actual value input. In addition
to this automatic assignment, you can select other reference value
sources with PNU A001.
The fixed values (PNU A020 to A035) have priority over all other
reference value sources.
The reference values are given as a percentage (0 to 100 %)
except for PNU F001 and the fixed values PNU A020 to A035,
which are given as specified in PNU A075.
Figure 138:Block diagram, PID control (cont. from Fig.137)
a w = reference value channel
b x = actual value channel (process variable PV)
c Manipulated variable (output frequency)
A078
A075
D
A073
I
A071
A077
x (1)
A072
P
+ ( )
(+)
X
b
W
a
32154
C005 ... C001
...
2423
+
+
+
c
A004
A061
A062
PNU A001 Reference value source
00 Potentiometer of the LCD keypad
02 Input through PNU F001 or as fixed value PNU A020 to
A035 (binary-encoded selection CF1 to CF4 through
digital input 1 to 6).
03 Serial interface (Modbus)
10 Calculator (calculated value of CAL)