Mitsubishi Electric FX2N Beginners Manual page 46

The Basic Instruction Set
Ladder Diagram
X001
0
X002
2
X1
X2
M0
This example is a program for controlling a pump to fill a container. The pump is controlled
manually with two pushbuttons, ON and OFF. For safety reasons a break contact is used for the
OFF function. When the container is full a level sensor automatically switches the pump off.
Ladder Diagram
X001
0
Pump
ON
X002
2
Pump
OFF
X003
Level
sensor
3 – 16
SET M0
RST M0
If the set and reset instructions for the same
device both evaluate to "1" the last operation
performed has priority. In this example that
is the RST instruction, and so M0 remains
off.
SET Y000
Pump
RST Y000
Pump
An Introduction to Programming
Instruction List
0 LD X001
1 SET M0
2 LD X002
3 RST M0
t
Instruction List
0 LD X001
1 SET Y000
2 LDI X002
3 OR X003
4 RST Y000
MITSUBISHI ELECTRIC