The Structure Of Ladder Diagram And Information - Delta C2000 series User Manual

Internal Device
PLC needs to handle data and operation when controlling each order, timer value
and counter value. The data register is used to store data or parameters. It stores
16-bit binary number, i.e. a word, in each register. It uses two continuous number
Data register
of data register to store double words.
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The structure of ladder diagram and information:

Ladder Diagram
Structure
Equipment indication: D0, D1,...,D399. The symbol of equipment is D and
numbering in decimal system.
Explanation
Normally open, contact a
Normally closed, contact b
Serial normally open
Parallel normally open
Parallel normally closed
Rising-edge trigger switch
Falling-edge trigger switch
Rising-edge trigger in serial
Falling-edge trigger in
serial
Rising-edge trigger in
parallel
Falling-edge trigger in
parallel
Block in serial
Block in parallel
16-11
Chapter 16 PLC Function C2000 Series
Function
Command
LD
LDI
AND
OR
ORI
LDP
LDF
ANDP
ANDF
ORP
ORF
ANB
ORB
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
none
none