Delta C2000 Series User Manual page 509

Classical field oriented control ac motor drive
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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
X1
X11 X12 X13
00000
5 R Z 1 X P E H U
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
Explanation of commands
Block parallel
Multiple outputs
Coil driven output
commands
Some basic commands,
applications commands
Inverted logic
X2
X3
X4
X5
X6
X0
X1
M0
M1
X3
16-17
Command
ORB
MPS
MRD
MPP
OUT
Some basic
commands
Applications
commands
INV
X7 X10 C0
C1
Y1
X4
T0
M3
TMR
PLC Function Applications
Using Device
N/A
N/A
Y M
N/A
00000
Y0
Y1
T0
K10

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