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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
9 Move and Compare – FNC 10 to FNC 19
9.2 FNC 11 – ZCP / Zone 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
9.2 FNC 11 – ZCP / Zone Compare
Outline
This instruction compares two values (zone) with the comparison source, 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 18.2.
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 (ZCP and ZCPP)
The lower comparison value and upper comparison value are compared with the comparison source
. According to the result (smaller, within zone or larger), either one among , +1 and +2 turns
ON.
• Comparison is executed algebraically. Example: −10 < 2 <10
Operand Type Description Data Type
Data or device number handled as lower comparison value 16- or 32-bit binary
Data or device number handled as upper comparison value 16- or 32-bit binary
Data 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
33333333S2 33 3 33
33 3 S1 3
DZCP
DZCPP
Mnemonic Operation Condition
P
FNC 11
ZCP
D
16-bit Instruction
9 steps
ZCP
ZCPP
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
17 steps
Continuous
Operation
Pulse (Single)
Operation
S
1
S
2
S
D
S
1
S
2
S
D
S
1
S
2
S
D
D
D
FNC 11
ZCP
Even if the command input turns OFF and ZCP instruction is not executed, , +1 and +2 latch
the status just before the command input turns OFF from ON.
Command
input
S
1
S
2
S
D
D
+1
D
+2
D
D
D
D
Turns ON in the case of
S
S
2
>
] "." [
Turns ON in the case of
S
1
≤
S
S
2
≤
] "." [
Turns ON in the case of
S
1
>
S
] "." [