Omron 3G3RX User Manual

4-31
4-2 Function Mode
4
Functions
PID Function
•This function enables process control of such elements as flow rate, air volume, and pressure.
•To use this function, set A071 to "01" or "02".
•You can disable the PID operation in progress using an external signal.
To use this function, allocate "23" (PID: PID disabled) to any of the multi-function inputs. While the
PID terminal is turned on, the Inverter disables the PID function and outputs normally.
•You can limit the PID output under various conditions.
Basic Structure of PID Control (Example)
Parameter No. Function name Data Default setting Unit
A071 PID selection
00: OFF (Disabled)
01: ON (+) (Enabled)
02: ON (+/-) (Reverse output
enabled)
00 
A072 PID P gain 0.2 to 5.0 1.0 
A073 PID I gain 0.0 to 3600.0 1.0 s
A074 PID D gain 0.00 to 100.00 0.00 s
A075 PID scale 0.01 to 99.99 1.00 Time
A076 PID feedback selection
00: OI
01: O
02: Modbus (RS485
communication)
03: Pulse (Pulse train frequency)
10: Math (Operation function
output)
00 
A077 Reverse PID function
00: OFF (Deviation = Target value
- Feedback value)
01: ON (Deviation = Feedback
value - Target value)
00 
A078 PID output limit function 0.0 to 100.0 0.0 %
A079 PID feedforward selection
00: Disabled
01: O
02: OI
03: O2
00 
C044 PID deviation excessive level 0.0 to 100.0 3.0 %
C052 PID FB upper limit
0.0 to 100.0
100.0 %
C053 PID FB lower limit 0.0 %
Related functions d004, A001, A005, A006, C001 to C008, C021 to C025
fs
M
+
-
+
-
Deviation 
: Deviation
sTd
sT
Kp
i
1
1
Target
value
0 to 10 V
4 to 20 mA
+
+
Control volume
Disabled
0 to 10 V
4 to 20 mA
-10 to 10 V
Feedback 0 to 10 V
4 to 20 mA
Normal control
of the Inverter
Transducer
Sensor
Kp: Proportional gain Ti: Integral time Td: Derivative time s: Operator
Feedforward

Omron 3G3RX Specifications

General

Brand	Omron
Model	3G3RX
Category	DC Drives
Language	English