15
2. Instruction symbols
The following shows the basic instructions of sequence control.
ï‚¢ Creating a program
Create a sequence program.
The following shows how to create a sequence program with basic devices and instruction symbols
for sequence control.
The following devices and instruction symbols are used.
• Input: X device
• Output: Y device
• Instruction symbols: , ,
Create a program that performs the following controls.
• When the X0 and X1 switches are turned ON, the Y10 output lamp turns ON.
• When the X2 switch is turned ON, the Y1E and Y1F output lamps turn OFF.
The following explains the procedure to create this sequence program.
Instruction
symbol
Description
Open contact: Conducts when an input signal is
set to ON.
Closed contact: Conducts when an input signal is
set to OFF.
Coil output: Outputs data to a specified device.
This section explains the most basic devices and instructions.
In addition to those listed above, other devices and instructions convenient for sequence
control are available.
QCPU Programming Manual (Common Instructions): SH-080809
QnACPU Programming Manual (Common Instructions): SH-080810
QY40P
0 1 2 3 4 5 6 7
8 9 A B C D E F
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
COM
24VDC
0 . 1A
12VDC
QX40
0 1 2 3 4 5 6 7
8 9 A B C D E F
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
COM
F
X0
X1
X2
Y10
Y1E
Y1F
<Y10>
<Y1E>
<Y1F>
[END]
0
3
6
X1X0
X2
NC
24VDC
4mA
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