Mitsubishi Electric MELSEC FX Series - Page 145

7 Applied Instructions
7.2 Move and Compare
143
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
3. Applicable devices
S: Refer to "Cautions".
Function and operation explanation
1. 16-bit operation(CMP, CMPP)
The comparison value specified by and the comparison source specified by are compared with
each other. According to the result (smaller, equal or larger), any of the three points of the devices specified
by turns on.
• The source data specified by and are handled as BIN (binary) values.
• Comparison is executed algebraically. Example: -10 < 2
Operand
type
Bit Devices Word Devices Others
System User Digit Specification
System
User
Special
Unit
Index Constant
Real
Number
Character
String
Pointer
XYMTCS
D.b
KnX KnY KnM KnS TCD R
U\G
VZModifier K H E
""
P
zzzzzzz
S2 S3
zz z z z
zzzzzzz
S2 S3
zz z z z
zz z
S1
z
*1 This defines the head bit device that stores the comparison result. (Defines M100)
Command input
Even if the command input turns OFF and CMP instruction is not executed,
to +2 latch the status just before the command input turns OFF from ON.
Command
input
48
49
50
51
Latched
Latched
Latched
CMP
EN
s1
s2
ENO
d
Comparison
value data
Comparison
source data
Label1
*1
(M100)
M100
M101
M102
s2
d
+1
d
+2
d
d
s1
s1 s2
Turns on in the case of >
d
s1 s2
Turns on in the case of =
s1 s2
Turns on in the case of <