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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:
Ò
Ó
Ô
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.
Example +
D+
16-bit instruction 32-bit instruction
• Instructions executed only at the rising edge of OFF to ON: The letter "P" is added to the end of the instruction.
Example +
+P
Instruction executed
Instruction executed
when ON
only at the leading
edge of OFF to ON
• Real number instructions: The letter "E" is added to the first line of the instruction.
Example +
E+
Real number instructions
• Character string instructions: A dollar sign $ is added to the first line of the instruction.
Example +
$+
Character string instructions
Shows symbol diagram on the ladder.
+
S D
Indicates destination.
Indicates source.
Indicates instruction symbol.
• Destination: Indicates where data will be sent after operation.
• Source: Stores data prior to operation.
Õ
Ö
+
×
Ø
Ù
S1 S2
D
Indicates destination.
Indicates source.
Indicates instruction symbol.
2 INSTRUCTION TABLES
2.2 How to Read Instruction Tables
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