Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 198)

5 Categories & Use of Application Instructions
DVP-PLC Application Manual 5-6
5.2 Composition of Application Instruction
ƒ An application instruction has two parts: the instruction and operands.
Instruction: The function of the instruction
Operands: Devices for processing the operations of the instruction
The instruction part of an application instruction usually occupies 1 step, and one operand occupies 2 or 4 steps
depending on the instruction is a 16-bit or 32-bit one.
ƒ Format of an application instruction:
1 2 3 4 5 6 7
8
9 11
12
13
10
API
41 P DECO
Mn emo nic
S D n
Operan ds F un cti on
Decode
Co ntrol lers
ES /EX /SS SA /SX /SC EH /S V
Prog ram Ste ps
DECO, DECOP: 7 steps
Bi t Devic es Word De vices
X Y M S K H Kn X Kn Y KnM KnS T D C E F
Typ e
OP
S
D
n
* * * * * * * * *
* * * * * ** * *
* *
* *
E S E S E S S S E X S A S X S C E H S V E X S S S A S X S C E H S V E X S S S X S A S C E H S V
PUL SE 16 -b it 32 -bit
API No.
Indication of if there is a 16-bit or 32-bit instruction. If there is a 32-bit instruction, the column will be marked
with “D”.
Mnemonic of the application instruction
Indication of if there is a pulse execution type instruction. If there is a pulse instruction, the column will be
marked with “P”.
Operands
Function of the application instruction
DVP-PLC applicable to the application instruction. ES includes ES/EX/SS, SA includes SA/SX/SC, EH
includes EH/EH2/SV.
Steps occupied by the 16-bit/32-bit/pulse execution instruction
DVP-PLC applicable to the pulse/16-bit/32-bit instruction
Column marked with * and in grey refers to E, F index register modification is applicable.
Column marked with * is the device applicable for the operand
Device name
Device type
ƒ Input of application instruction:
Some application instructions are only composed of the instruction part (mnemonic), e.g. EI, DI, WDT…. Most
application instructions are composed of the instruction part and many operands.