IDEC MICROSmart FC6A Series Ladder Programming Manual page 436

19: PID C I
ONTROL NSTRUCTION
Ladder program
PID control
enable input
I0000
Alarm 1 output
M0003
PID control
enable input
I0000
Alarm 1 output
M0003
Analog input
status error
M0020
PID control
enable input
I0000
PIDA error
M0021
Device Address
D0000 Process variable (after conversion)
D0002 Operating status
D0007 Set point
D8172 Analog Status to the Analog I/O Cartridge
I0000 PID control enable input
Q0000 Heater output
Q0001 Alarm lamp
1. The PIDA instruction operates when I0 is ON.
2. When M0003 (Alarm 1 output (process high alarm)) is OFF and M0020 is OFF (the analog input status error for the
analog I/O cartridge is 0 to 2), Q0 (heater output) turns ON/OFF according to the manipulated variable and control period
calculated by PID control. The heater output turns OFF when an error occurs.
3. When the analog input status error for the analog I/O cartridge is 5, 6, or 8 to 11, M0020 turns ON.
4. When M0003 (Alarm 1 output (process high alarm)) is ON or M0020 is ON (when the analog input status error for the
analog I/O cartridge is 5, 6, or 8 to 11), Q1 (alarm lamp) turns ON.
5. The operating status of the PIDA instruction is judged, and when an error occurs, M0021 turns ON and Q1 (alarm lamp)
turns ON.
Note:
The analog status for the analog I/O cartridge is as follows.
• Analog input status error
0: Operating normally
1: Converting data
2: Initializing
5, 6: Wiring error
8 to 11: Analog I/O cartridge error
For details, see Chapter 10 "Analog I/O Cartridge" in the "FC6A Series MICROSmart User's Manual".
19-46
Process variable
(after conversion) Initialize Pulse
PIDA S1 S2
D0000 M8120
Analog input
status error PIDA error
M0020 M0021
Analog Status to
the Analog I/O Cartridge
CMP>=(W) S1 - S2 -
D8172 5
Operating status
ICMP>=(W) S1 S2
109 D0002
Comment
FC6A S MICROS
ERIES MART
Control action Set point
S3 S4
M0000 D0007
Alarm lamp
R
Q0001
Heater output
Control output
Q0000
M0005
Analog input
status error
D1 - REP
M0020
Alarm lamp
S
Q0001
PIDA error
S3 D1
103 M0021
Alarm lamp
S
Q0001
Device Address
M0000
M0003
M0005
M0020
M0021
M8120
L P M
ADDER ROGRAMMING ANUAL
1.
2.
3.
4.
5.
Comment
Control action
Alarm 1 output
Control output
Analog input status error
PIDA error
Initialize Pulse
FC9Y-B1726