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Mitsubishi Electronics FX3G User Manual

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411
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
 Series
Programming Manual - Basic & Applied Instruction Edition
14 Handy Instruction – FNC 60 to FNC 69
14.7 FNC 66 – ALT / Alternate State
11
FN
C30
-FN
C3
9
R
ota
tion and 
Shi
ft
12
FN
C40-FN
C49
D
ata O
perati
on
13
FNC
50-FNC
59
High-Speed
 
Proc
essing
14
FM
C60-FN
C69
H
andy 
In
struction
15
FN
C70-FN
C79
E
xternal
 F
X
 I/O
 
De
vice
16
FNC
80-FNC
89
External
 FX 
Dev
ice
17
FNC1
00-
FNC10
9
Dat
a 
Transfer 2
18
FNC1
10-
FNC139
Fl
oati
ng Poi
nt
19
FNC14
0-F
N
C
149
Da
ta
 
Operation 2
20
FNC1
50-
FNC159
Pos
itioning 
Control
14.7
FNC 66 – ALT / Alternate State
Outline
This instruction alternates a bit device (from ON to OFF or from OFF to ON) when the input turns ON.
1. Instruction format
2. Set data
3. Applicable devices
S: "D .b" is available only in FX
3U
 and FX
3UC
 PLCs. However, index modifiers (V and Z) are not available.
Explanation of function and operation
1. 16-bit operation (ALT and ALTP)
Alternating output (1-step)
Every time the command input turns from OFF to ON, a bit device specified in 
 is alternated (from ON to OFF or
from OFF to ON).
Dividing output (by 2-step alternating output)
Multi-step dividing outputs are achieved by combination of two or more ALTP instructions.
Operand type
Description
Data type
Bit device number whose output is alternated
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
X Y M T C S D .b KnX KnY KnM KnS T C D R U \G
V Z Modify K H
E
" "
P
S
P
FNC 66
ALT
−
−
Mnemonic
Operation Condition
16-bit Instruction
 3 steps ALT
ALTP
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
  D
S
2
 ‚
  D
  
D
1
   
D
Command
input
FNC 66
ALTP
D 
Command input
D 
ON
ON
ON
ON
ON
1st step
2nd step
Command
input
ON
ON
ON
ON
ON
ON
ON
Command
input
FNC 66
ALTP
M0
D 
FNC 66
ALTP
M1
D 
Specify the same device
M0
D 
M0
D 
M1