Mitsubishi Electronics FX3G Video Gaming Accessories User Manual


 
241
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
9 Move and Compare – FNC 10 to FNC 19
9.1 FNC 10 – CMP / Compare
1
Introduction
2
Overview
3
Instruction
List
4
Devices
in Detail
5
Specified the
Device &
Constant
6
Before
Programming
7
Basic
Instruction
8
FNC00-FNC09
Program Flow
9
FNC10-FNC19
Move & Compare
10
FNC20-FNC29
Arith. & Logic
Operation
9.1 FNC 10 – CMP / Compare
Outline
This instruction compares two values, and outputs the result (smaller, equal or larger) to bit devices (3 points).
For the contact comparison instruction, refer to Chapter 28.
For floating point comparison, refer to Section 18.1.
1. Instruction format
2. Set data
3. Applicable devices
S1: "D.b" is available only in FX3U and FX3UC PLCs. However, index modifiers (V and Z) are not available.
S2: This function is supported only in FX
3U/FX3UC PLCs.
Explanation of function and operation
1. 16-bit operation (CMP and CMPP)
The comparison value and the comparison source are compared with each other. According to the
result (smaller, equal or larger), either one among , +1 and +2 turns ON.
The source data are handled as binary values.
Comparison is executed algebraically. Example: 10 < 2
Operand Type Description Data Type
Data or device number handled as comparison value 16- or 32-bit binary
Date or device number handled as comparison source 16- or 32-bit binary
Head bit device number to which comparison result is output Bit
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD.b KnX KnY KnM KnS T C D R U\G VZModifyKH E ""P
33333333S2 33 3 33
33333333S2 33 3 33
33 3 S1 3
DCMP
DCMPP
Mnemonic Operation Condition
P
FNC 10
CMP
D
16-bit Instruction
7 steps
CMP
CMPP
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
13 steps
Continuous
Operation
Pulse (Single)
Operation
S
1
S
2
D
S
1
S
2
D
S
1
S
2
D
D
D
S
1
S
2
FNC 10
CMP
S
1
Even if the command input turns OFF and CMP instruction is not executed, , +1 and +2 latch
the status just before the command input turns OFF from ON.
Command
input
48
49
50
51
Latched
Latched
+1
+2
Latched
Command
input
S
2
D
D
S
1
S
2
D
D
D
+1
D
+2
D
D
D
D
<
S
1
S
2
] ".
Turns ON in the case of
" [
=
S
1
S
2
] ".
Turns ON in the case of
" [
>
S
1
S
2
] ".
Turns ON in the case of
" [