14.1 BCC (Block Check Code Calculation)
■
Ladder diagram
■
Available operation units (●: Available)
Operatio
bit
n unit
i
■
List of operands
Operand
Description
S1
Area storing data specifying the calculation method, or constant data
S2
Starting address of the area storing target data
S3
The area that stores the length (number of bytes) of the targeted data, or the constant
D
Area that stores operation results
■
Available devices (●: Available)
Operan
d
W
W
X
Y
S1
●
●
S2
●
●
(Note
S3
●
●
4)
D
●
●
(Note 1)
Can be specified only when the operation unit is signed integer (SS).
(Note 2)
Can be specified only when the operation unit is unsigned integer (US).
(Note 3)
Can be specified only when the operation unit is an integer (US, SS).
(Note 4)
16-bit unsigned integers, regardless of operation unit.
■
Outline of operation
● Calculates block check code (BCC).
WUME-FP7CPUPGR-12
US
●
16-Bit device:
W
W
W
S
D
L
R
L
S
D
T
D
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
14.1 BCC (Block Check Code Calculation)
SS
UL
●
32-Bit
device:
TS
TE
U
W
WI
C
C
M
O
S
E
SL
SF
Real
Integer
numbe
r
K
H
U
(N
(N
(N
D
IX
SF
F
ote
ote
ote
1)
2)
3)
●
●
●
●
●
DF
St
rin
g
Index
modifie
r
" "
●
●
●
●
14-3