5 Categories & Use of Application Instructions
DVP-PLC Application Manual
5-6
5.2 Composition of Application Instruction
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.
Format of an application instruction:
1
2
3
4
5
6
7
8
9
11
12
13
10
API
41
P
DECO
Mnemonic
S
D
n
Operands
Function
Decode
Controllers
ES /EX /SS
SA /SX /SC
EH /S V
Program Steps
DECO, DECO P: 7 steps
Bit Devic es Word Devices
XYM
SK
H
Kn X
KnY
KnM
KnS
T
D
C
E
F
Type
OP
S
D
n
****** ***
*********
**
**
ES ES ESSSEX SA SX SC EH SV EX SS SA SX
SC
EH SV EX SS SXSA SC EH SV
PULSE 16-bit 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
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.
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