User`s manual

FX communication
RS instruction 9
9-14
9.3.2 Deal with 8 bits Data
When M8161 is set to ON (M8161 is shared by an ASCII instruction, a HEX instruction and a
CCD instruction.)
1 ) Send data and remaining number of send data
2 ) Receive data and number of receive data
Ignored Lower 8 bits
The upper 8 bits are ignored,
and the lower 8 bits exclusiuely
are regarcled as valid.
16-bit data
STX D200 lower D201 lower D202 lower D203 lower ETX
STX D500 lower D501 lower D502 lower D503 lower D504 lower D505 lower ETX
Head address specified by
Send byte count
specified by "m"
S·
Terminator
Head address specified by
It does not exceed the upper limit number
of receive data points (byte count)
specified by "m".
Receive is completed when the terminator
(ETX) or "n" points are received.
Terminator
D·
Header
Header
Send data
(Programmdble
controller
→
External
equipment)
Receive data
(External
equipment
→
Programmdble
controller)
X010
FNC 80
RS
D200 K 4 D500 K 10
S·
m
D·
n
8-bit mode
M8000
M8161
D200 lower D201 lower D202 lower D203 lower
0
1
2
3
4
STX ETX
Remaining number
of send data D8122
Send data SD (TXD)
D500 lower D501 lower D502 lower D503 lower D504 lower D505 lower
The number of
receive data is also
reset when the
receive completion
flag M8123 reset.
6
5
4
3
2
1
0
STX ETX
Receive data RD (RXD)
Number of receive data
D8123