Mitsubishi Electronics FX3G User Manual
371
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
Programming Manual - Basic & Applied Instruction Edition
13 High-Speed Processing – FNC 50 to FNC 59
13.7 FNC 56 – SPD / Speed Detection
11
FN
C30
-FN
C3
C30
-FN
C3
9
R
ota
tion and
Shi
ft
ft
12
FN
C40-FN
C40-FN
C49
D
ata O
perati
perati
on
13
FNC
50-FNC
59
High-Speed
Proc
essing
14
FM
C60-FN
C60-FN
C69
H
andy
In
struction
15
FN
C70-FN
C70-FN
C79
E
xternal
F
X
I/O
De
vice
16
FNC
80-FNC
89
External
FX
Dev
ice
ice
17
FNC1
00-
FNC10
00-
FNC10
9
Dat
a
a
Transfer 2
18
FNC1
10-
FNC139
FNC139
Fl
oati
ng Poi
nt
19
FNC14
0-F
N
C
149
Da
ta
Operation 2
20
FNC1
50-
FNC159
FNC159
Pos
itioning
itioning
Control
13.7
FNC 56 – SPD / Speed Detection
Outline
This instruction counts the input pulse for a specified period of time as interrupt input.
The function of this instruction varies depending on the version.
The function of this instruction varies depending on the version.
1. Instruction format
2. Set data
3. Applicable devices
S1: Specify X000 to X007 in FX
3G
/FX
3GC
/FX
3U
/FX
3UC
PLCs.
Specify X000 to X005 in FX
3S
PLC.
S2: This function is supported only in FX
3G
/FX
3GC
/FX
3U
/FX
3UC
PLCs.
S3: This function is supported only in FX
3U
/FX
3UC
PLCs.
Operand Type
Description
Data Type
Device number of pulse input (X)
Bit
Time data (ms) or word device number storing the data
16- or 32-bit binary
Head word device number storing the pulse density data
16- or 32-bit binary
Oper-
and
Type
Bit Devices
Word Devices
Others
System User
Digit Specification
System User
Special
Unit
Index
Constant
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
1
S
2
S
3
S
2
Mnemonic
Operation Condition
32-bit Instruction
13 steps DSPD
Continuous
Operation
7 steps SPD
Continuous
Operation
16-bit Instruction
Mnemonic
Operation Condition
FNC 56
SPD
D
S
1
S
2
D
S
1
S
2
D