7 Applied Instructions
7.18 Others
597
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
1
Outline
2
Instruction List
3
Configuration of
Instruction
4
How to Read
Explanation of
Instructions
5
Basic Instruction
6
Step Ladder
Instructions
7
Applied
Instructions
8
Interrupt Function
and Pulse Catch
Function
A
Relationships
between devices
and addresses
7.18 Others
7.18.1 COMRD
Outline
This instruction reads the comment data for registered devices written to the PLC by programming software
such as GX Works2.
1. Format and operation, execution form
2. Set data
3. Applicable devices
FX3U(C) FX3G FX2N(C) FX1N(C) FX1S FXU/FX2C FX0N FX0(S)
Instruction
name
Operation
Execution
form
Expression in each language
Structured ladder ST
COMRD 16 bits Continuous COMRD(EN,s,d);
COMRDP 16 bits Pulse COMRDP(EN,s,d);
Variable Description Data type
Input
variable
EN Execution condition Bit
Device for which comment to be read is registered ANY_SIMPLE
Output
variable
ENO Execution state Bit
Head device storing read comment String
Operand
type
Bit Devices Word Devices Others
System user Digit specification
System
user
Special
unit
Index
Cons
tant
Real
Number
Character
String
Pointer
XYMTCS
D.b
KnX KnY KnM KnS T C D R
U\G
V Z Modifier K H E
""
P
zzz z z z z z z
zzz z z
COMRD
EN ENO
d
s
COMRDP
EN ENO
d
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