Pid Function - Omron SYSDRIVE RX Series User Manual

4-2 Function Mode

PID Function

•This function enables process control of such elements as flow rate, air volume, and pressure.
Parameter No.
A071
A072
A073
A074
4
A075
A076
A077
A078
A079
C044
C052
C053
Related functions
•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)
Target
Deviation ε
value
+
-
0 to 10 V
4 to 20 mA
Feedback 0 to 10 V
4-31
Function name
PID selection
PID P gain
PID I gain
PID D gain
PID scale
PID feedback selection
Reverse PID function
PID output limit function
PID feedforward selection
PID deviation excessive level 0. to 100.
PID FB upper limit
PID FB lower limit
Feedforward
1
+
Kp 1 + + Td s
T s
-
i
4 to 20 mA
Kp: Proportional gain
Data
00: Disabled
01: Enabled
02: Reverse output enabled
0.2 to 5.0
0.0 to 3600.0
0.00 to 100.0
0.01 to 99.99
00: FI-FC (4 to 20 mA)
01: FV-FC (0 to 10 V)
02: RS485 communication
03: Pulse train frequency
10: Operation function output
00: Deviation = Target value -
Feedback value
01: Deviation = Feedback value -
Target value
0.0 to 100.0
00: Disabled
01: FV-FC (0 to 10 V)
02: FI-FC (4 to 20 mA)
03: FE-FC (-10 to 10 V)
0.0 to 100.0
d004, A001, A005, A006, C001 to C008, C021 to C025
Disabled
0 to 10 V
4 to 20 mA
-10 to 10 V
Control volume
Normal control
of the Inverter
fs
Ti: Integral time Td: Derivative time
Default setting Unit
⎯
00
⎯
1.0
1.0 s
0.0 s
1.00 Time
⎯
00
⎯
00
0.0 %
⎯
00
3.0 %
100 %
0.0 %
Sensor
M
Transducer
ε: Deviation
s: Operator