User Manual

High−level Instructions
3 − 768
Outline Temperature control (PID) can be easily performed using the image of a
temperature controller.
Program example
Ladder
Diagram
Boolean
Ladder Diagram
Address Instruction
S1
Trigger
F356 EZPID, WR1, WX2, DT32710, DT10010
R1
S2
S3
Y0
S4
10
11
21
ST R 1
F356(EZPID)
WR1
WX2
DT32710
DT100
OT Y 0
S1 Control data
S2 Measured value (PV)
S3 Starting No. of area storing PID control parameter
S4 Starting No. of PID processing work area
Operands
Operand
Relay T imer/Counter Register
Index
register
SWR
SDT
Constant
Inde
x
Operand
WX WY WR WL SV EV DT LD
In
(*1)
SWR SDT
K H
Index
modifier
S1 N/A A A A A A A A A N/A N/A N/A N/A −
S2 A A A A A A A A A A A N/A N/A −
S3 N/A A A A A A A A N/A N/A N/A N/A N/A −
S4 N/A A A A A A A A N/A N/A N/A N/A N/A −
(*1) I0 to ID.
Operation
PID processing is performed to hold the measured value (PV) at the set value (SP).
Writing OUT instruction immediately after this instruction enables the PWM output (on−off output) similar to a
temperature controller.
Auto−tuning function is also available to calculate the control parameter of PID automatically.
It can be used with analog output as it outputs values as well as PWM output.
Easy PID
5
F356
(EZPID)
Availability
FP−X: Ver 1.20 or more
FPΣ: 32k/FP0R
A
:
A
vailable
N/A: Not Available