Mitsubishi Electric FX3G SERIES Programming Manual page 471

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
3. 8-bit conversion mode (while M8161 is ON)
(M8161 is used also for the RS, ASCI, HEX and CRC instructions.)
With regard to "n" data starting from
stored to and
D
M8161 is also used for the RS, ASCI, HEX and CRC instructions. When using the 8-bit mode, set M8161 to normally
ON. M8161 is cleared when the PLC mode is changed from RUN to STOP.
M8000
Command
input
FNC 84
CCD
Example of 8-bit conversion
In the following program, conversion is executed as follows:
M8000
X010
FNC 84
CCD
S
D 100
D 101
D 102
D 103
D 104
D 105
D 106
D 107
D 108
D 109
Total
Horizontal parity
D 0 0 0 0
0 0 0
D 1
S , the addition data and horizontal parity data of only low-order 8 bits are
+1 respectively.
D
M8161
S D n
M8161
D100 D0 K10
Example of data contents
K100 = 01100100
K111 = 0110111 (1)
K100 = 01100100
K 98 = 01100010
K123 = 0111101 (1)
K 66 = 01000010
K100 = 01100100
K 95 = 0101111 (1)
K210 = 11010010
K 88 = 01011000
K1091
1000010 (1)
0 0 1 0 0 0 1 0
0 0 0 0 0 1 0 0
16 External FX Device – FNC 80 to FNC 89
8-bit mode
Ignored
8-bit mode
←
←
←
← When the number of "1" is odd, the horizontal parity is "1".
When the number of "1" is even, the horizontal parity is "0".
0 0 0 1 1 "1091" in BCD
0 0 1 0 1 Horizontal parity
16.5 FNC 84 – CCD / Check Code
16 bits
Low-order 8 bits
Source data
11
12
13
14
15
16
17
18
19
20
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