Mitsubishi MELSEC QCPU User Manual

2 - 3 2 - 3
MELSEC-Q/QnA
2 INSTRUCTION TABLES
3
...........Shows symbol diagram on the ladder
+
Indicates destination
Indicates source
Indicates instruction symbol
SD
Indicates destination
Indicates source
Indicates instruction symbol
+ DS1 S2
Fig. 2.1 Shows Symbol Diagram on the Ladder
Destination ....................Indicates where data will be sent after operation
Source...........................Stores data prior to operation
4
...........Indicates the type of processing that is performed by individual instructions
(D)+(S) (D)
Indicates 16 bits
(D+1, D)+(S+1, S)
(D+1, D)
Indicates 32 bits
16 bits 16 bits
D+1 D
The upper 16 bits The lower 16 bits
Fig. 2.2 Type of Processing Performed by Individual Instructions
5
...........The details of conditions for the execution of individual instructions are as follows:
Symbol Execution Condition
No symbol recorded
Instruction executed under normal circumstances, with no regard to the ON/OFF
status of conditions prior to the instruction.
If the preconditions is OFF, the instruction will conduct OFF processing.
Executed during ON; instruction is executed only while the precondition is ON.
If the preconditions is OFF, the instruction is not executed, and no processing is
conducted.
Executed once at ON; instruction executed only at leading edge when precondition
goes from OFF to ON. Following execution, instruction will not be executed and no
processing conducted even if condition remains ON.
Executed during OFF; instruction is executed only while the precondition is OFF.
If the precondition is ON, the instruction is not executed, and no processing is
conducted.
Executed once at OFF; instruction executed only at trailing edge when precondition
goes from ON to OFF. Following execution, instruction will not be executed and no
processing conducted even if condition remains OFF.
6
...........Indicates the basic number of steps for individual instructions.
See Section 3.8 for a description of the number of steps.
7
...........The “ ” mark indicates instructions for which subset processing is possible.
See Section 3.5 for details on subset processing.
8
...........Indicates the page numbers where the individual instructions are explained.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

Mitsubishi MELSEC QCPU Specifications

General

Brand	Mitsubishi
Model	MELSEC QCPU
Category	Controller
Language	English