Mitsubishi Electric MELSEC-Q/L - How to Read Instruction Tables

2 INSTRUCTION TABLES
2.2 How to Read Instruction Tables
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2.2 How to Read Instruction Tables
The instruction tables found from Page 25 Sequence Instructions to Page 79 Redundant System Instructions (For Redundant
CPU) have been made according to the following format:
 Classifies instructions according to their application.
 Indicates the instruction symbol added to the instruction in a program.
Instruction code is built around the 16-bit instruction.
The following notations are used to mark 32-bit instructions, instructions executed only at the rising edge of OFF to ON, real number instructions, and character
string instructions:
• 32-bit instruction: The letter "D" is added to the first line of the instruction.
• Instructions executed only at the rising edge of OFF to ON: The letter "P" is added to the end of the instruction.
• Real number instructions: The letter "E" is added to the first line of the instruction.
• Character string instructions: A dollar sign $ is added to the first line of the instruction.
 Shows symbol diagram on the ladder.
• Destination: Indicates where data will be sent after operation.
• Source: Stores data prior to operation.
ÒÓÔ Õ Ö×ØÙ
Example
+
D+
16-bit instruction 32-bit instruction
Example
+
+P
Instruction executed
when ON
Instruction executed
only at the leading
edge of OFF to ON
Example
+
E+
Real number instructions
Example + $+
Character string instructions
+
Indicates destination.
Indicates source.
Indicates instruction symbol.
SD
Indicates destination.
Indicates source.
Indicates instruction symbol.
+
D
S1 S2