Delta VFD300C43S-HS User Manual page 659

Device type
When a PLC is used to perform various types of sequence control and set time
value and count value control, it most commonly perform data processing and
numerical operations, and data registers are used exclusively for storage of data
and various parameters. Each data register contains 16 bits of binary data, which
Data register
means that it can store one word. Two data registers with adjacent numbers can
be used to process double words.

Ladder diagram images and their explanation
Ladder diagram
structures
Device indicated as: D0, D1 to D399, etc. The device is expressed as the
symbol "D" , and its order is expressed as a decimal number.
Explanation of commands
NO switch, contact a
NC switch, contact b
Series NO
Series NC
Parallel NO
Parallel NC
Positive edge-triggered
switch
Negative edge-triggered
switch
Positive edge-triggered
series
Negative edge-triggered
series
Positive edge-triggered
parallel
Negative edge-triggered
parallel
Block series
Block parallel
Multiple outputs
Coil driven output
commands
16-17
Chapter 16 PLC Function ApplicationsC2000-HS
Description of Function
Command
LD
LDI
AND
ANI
OR
ORI
LDP
LDF
ANDP
ANDF
ORP
ORF
ANB
ORB
MPS
MRD
MPP
OUT
Using Device
X、Y、M、T、C
X、Y、M、T、C
X、Y、M、T、C
X、Y、M、T、C
X、Y、M、T、C
X、Y、M、T、C
X、Y、M、T、C
X、Y、M、T、C
X、Y、M、T、C
X、Y、M、T、C
X、Y、M、T、C
X、Y、M、T、C
N/A
N/A
N/A
Y、M