9 - 40
MELSEC-F
WHEN COMMUNICATING DATA USING THE MC PROTOCOL
9
9 - 40
(2) Performing a loopback test while communicating in ASCII code
POINT
The number of the loopback data transmitted by an external device is returned to
the external device it is.
31
H
36
H
46
H
46
H
30
H
30
H
30
H
41
H
6
H
F
H
L
1
H
0
0
L
A
0
L
H
L
H
L
H
L
H
39
H
36
H
30
H
30
H
6
H
0
L
0
9
L
H
L
H
L
H
L
H
(Data name)
External device
side
(Example)
(Data name)
(Example)
PLC side
Subcommand
PC No.
Monitoring
timer
Complete code
Subcommand
Data length
(1 to 254 bytes)
Head send data
Second send data
Last send data
Data length
(1 to 254 bytes)
Head send data
Second send data
Last send data
(Designated byte length 2) +10bytes
(Designated byte length 2) +6bytes
