Delta CFP2000 Series User Manual page 591

Chapter 16 PLC Function Applications│CFP2000
Ladder diagram
structures
16-4-3 Overview of PLC ladder diagram editing
The program editing method begins from the left busbar and proceeds to the right busbar (the
right busbar is omitted when editing using WPLSoft). Continue to the next row after completing each
row; there is a maximum of 11 contacts on each row. If this is not sufficient, a continuous line will be
will be generated to indicate the continued connection and more devices can be added. A continuous
series of numbers will be generated automatically and identical input points can be used repeatedly.
See figure below:
X0
00000
The ladder diagram programming method involves scanning from the upper left corner to the
lower right corner. The coils and applications command computing box are handled in the output, and
the ladder diagram is placed on the farthest right. Taking the figure below as an example, we can
gradually analyze the procedural sequence of the ladder diagram. The number in the upper right
corner gives the sequential order.
Explanation of command sequence
1 LD X0
2 OR M0
3 AND X1
4 LD X3
AND M1
ORB
5 LD Y1
AND X4
6 LD T0
AND M3
ORB
7 ANB
8 OUT Y1
TMR T0
Explanation of commands
Coil driven output
commands
Some basic commands,
applications commands
Inverted logic
X1 X2 X3 X4
X11 X12 X13
Row Number
X0
M0
X3
K10
Command
OUT
Some basic
commands
Applications
commands
INV
X5 X6 X7 X10 C0
X1 Y1
T0
M1
16-18
Using Device
Y, M
N/A
C1
00000
Y0
X4
Y1
M3
T0
TMR K10