Mitsubishi Electric MELSEC FX Series - Page 419

7 Applied Instructions
7.9 External Device (optional device)
417
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
1
Outline
2
Instruction List
3
Configuration of Instruction
4
How to Read Explanation of Instructions
5
Basic Instruction
6
Step Ladder Instructions
7
Applied Instructions
8
Interrupt Function and Pulse Catch Function
A
Relationships between devices and addresses
3. <8-bit conversion mode> When M8161=ON(M8161 is used commonly with RS, ASCI, HEX,
CRC instructions)
Of the data of n points (lower 8 bits only) starting from the device specified by , the addition data and the
horizontal parity data are stored in the device specified by .
M8161 is used commonly with RS, ASCI, HEX, CRC instructions. When using in 8 bits, you must keep always
ON.
M8161 is cleared when changed from RUN to STOP.
Example of 8-bit conversion
In the case of the program shown below, the conversion is executed as follows.
Example of data content
D 100 K100 = 01100100
D 101 K111
= 0110111
←
D 102 K100 = 01100100
D 103 K 98 = 01100010
D 104 K123
= 0111101
←
D 105 K 66 = 01000010
D 106 K100 = 01100100
D 107 K 95
= 0101111
←
D 108 K210 = 11010010
D 109 K 88 = 01011000
Total K1091
Horizontal parity
1000010
← When the number of "1" is an odd number, the horizontal
parity is 1.
When the number of "1" is an even number, the horizontal
parity is 0.
1100001000100000
D 0
1091 in BCD.
Horizontal parity
1010000100000000
D 1
M8000
8-bit mode
Head storage destination
device of calculated data
OUT
EN ENO
d
M8161
Command input
Head object device
Number of data
CCD
EN
s
n
ENO
d
16 bits
Source data
Ignored Lower 8 bits
X010
CCD
EN
s
ENO
d
n
D100
K10
D0
M8000
8-bit mode
OUT
EN ENO
M8161
d
1100001000100000
D 0
1091 in BCD.
1010000100000000
D 1
Horizontal parity