4-19
Chapter 4. Functions
PID control or ON/OFF control can be provided for a maximum of 4 loops. The following is a functional block
diagram of the respective controls.
z
Functional block diagram of PID control
PID control
Branching by AUTO/MANUAL mode
In MANUAL mode
Bumpless/preset selection
In AUTO mode
When fixed value output is not selected
Branching by RUN/READY mode
Branching by selection of fixed value output
In READY mode
READY MV
In RUN mode
Branching by “MV action if PV is bad”
When “Output MV if PV is abnormal”
is selected and PV is abnormal
MV if PV is bad
When “Output MV if PV is abnormal”
is not selected, or when PV is normal
MV
MANUAL
MV
When fixed value output is selected
Fixed value outputs 1 to 8
z
Functional block diagram of ON/OFF control
ON/OFF control
READY MV
ON or OFF is output
• When ON is output, MV = 100.0 %. When OFF is output, MV = 0.0 %.
• The time proportional cycle of the digital output (DO) is invalid.
• Analog output (AO) can also be output.
Branching by "MV action if PV is bad"
Branching by RUN/READY mode
In READY mode
MV if PV is bad
100.0 % when output value > 0.0 %
0.0 % when output value ≤ 0.0 %
In RUN mode
When fixed value output
is not selected
When "Output MV if PV is abnormal" is selected and PV is abnormal
When "Output MV if PV is abnormal"
is not selected, or when PV is normal
MV
Fixed value outputs 1 to 8
Branching by selection of fixed value output
When fixed value output is selected
4 - 4
Control
