Mitsubishi Electronics FX3G User Manual
595
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
Programming Manual - Basic & Applied Instruction Edition
24 Others – FNC181 to FNC189
24.4 FNC188 – CRC / Cyclic Redundancy Check
21
FNC160
-F
NC1
69
69
R
eal
T
T
ime C
lock
C
ontrol
22
FNC17
0-F
NC
179
179
E
xternal D
evice
23
FNC
180
Alternate
Instructions
24
FN
C181-
FNC18
9
O
thers
25
FNC190
-F
NC1
99
99
Bl
oc
k D
ata
ata
Op
er
er
ation
26
FNC20
0-F
NC209
C
har
ac
te
r S
trin
g
Con
tro
tro
l
27
FNC2
10-
FNC21
10-
FNC21
9
Dat
a
a
Operati
on 3
28
FNC220
-F
NC2
49
49
Da
ta
C
omp
ari
ari
son
29
FNC25
0-F
N
C
269
D
ata T
abl
e
e
Operation
30
FNC2
70-
FNC276
FNC276
Ex
-Dev
ice
Program example
In the program example shown below, the CRC value of the ASCII code “0123456” stored in D100 to D106 is
generated and stored to D0 when M0 turns ON.
generated and stored to D0 when M0 turns ON.
1. In the case of 16-bit mode
2. In the case of 8-bit mode
Contents of data
Target data
Device storing data for which CRC
value is generated
value is generated
D100
3130H
Low-order byte
30H
High-order byte
31H
D101
3332H
Low-order byte
32H
High-order byte
33H
D102
3534H
Low-order byte
34H
High-order byte
35H
D103
3736H
Low-order byte
36H
–
–
Device storing generated CRC value
D0
2ACFH
Low-order byte
CFH
High-order byte
2AH
Contents of target data
Device storing data for which the
CRC value is generated
CRC value is generated
D100
Low-order byte
30H
D101
Low-order byte
31H
D102
Low-order byte
32H
D103
Low-order byte
33H
D104
Low-order byte
34H
D105
Low-order byte
35H
D106
Low-order byte
36H
Device storing the generated CRC
value
value
D0
Low-order byte
CFH
D1
Low-order byte
2AH
M0
FNC188
CRC
D100
D0
K7
M8161
M8000
16-bit conversion mode
FNC188
CRC
M8161
M8000
D100
D0
K7
M0
8-bit conversion mode