Mitsubishi Electronics FX3G Video Gaming Accessories User Manual


 
485
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
18 Floating Point – FNC110 to FNC139
18.1 FNC110 – ECMP / Floating Point Compare
11
FNC30-FNC39
Rotation and
Shift
12
FNC40-FNC49
Data Operation
13
FNC50-FNC59
High Speed
Processing
14
FMC60-FNC69
Handy
Instruction
15
FNC70-FNC79
External FX I/O
Device
16
FNC80-FNC89
External FX
Device
17
FNC100-FNC109
Data
Transfer 2
18
FNC110-FNC139
Floating Point
19
FNC140-FNC149
Data
Operation 2
20
FNC150-FNC159
Positioning
Control
18.1 FNC110 – ECMP / Floating Point Compare
Outline
This instruction compares two data (binary floating point), and outputs the result (larger, same or smaller) to three
single bit devices.
For handling of floating point, refer to Subsection 5.1.3.
1. Instruction format
2. Set data
*1. When a constant (K or H) is specified, it is automatically converted from binary into binary floating point (real
number) when the instruction is executed.
3. Applicable devices
S1: "D.b" is available only in FX3U/FX3UC PLCs, and cannot be indexed with index registers (V and Z).
S2: This function is supported only in FX
3U/FX3UC PLCs.
Explanation of function and operation
1. 32-bit operation (DECMP and DECMPP)
The comparison value [ +1, ] is compared with the comparison source [ +1, ] as floating point
data, and either bit among , +1 and +2 turns ON according to the result (smaller, same or larger).
When a constant (K or H) is specified as [ +1, ] or [ +1, ], it is automatically converted from
binary into binary floating point (real number) when the instruction is executed.
Caution
1. Number of occupied devices
Three devices are occupied from ( , +1 and +2).
Make sure that these devices are not used for any other purpose.
Operand Type Description Data Type
Device number storing binary floating point data to be compared
Real number (binary)
*1
Device number storing binary floating point data to be compared
Head bit device number to which the comparison result is output (Three devices are
occupied.)
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
V Z Modify K H E "
"P
33
S2
333 3
33
S2
333 3
33 3
S
1
3
P
FNC 110
ECMP
D
Mnemonic Operation Condition
16-bit Instruction
DECMP
DECMPP
Mnemonic Operation Condition
32-bit Instruction
13 steps
Continuous
Operation
Pulse (Single)
Operation
S
1
S
2
D
S
1
S
2
D
S
1
S
1
S
2
S
2
D
D
D
S
1
S
1
S
2
S
2
Command
input
FNC110
DECMP
Even if the command input turns OFF and DECMP instruction is not executed, to +2 hold the status
before the please rewrite this command input turned OFF.
+1
+2
S
1
S
2
D
D
D
D
D
D
Turns ON in the case of
<
+1, ]
S
1
S
1
+1,[
S
2
S
2
" [
] ".
Turns ON in the case of
=
+1, ]
S
1
S
1
+1,[
S
2
S
2
" [ ] ".
Turns ON in the case of
>
] ".+1," [ ]
S
1
S
1
+1,[
S
2
S
2
D
D
D
D