Mitsubishi Melsec-L Series User Manual page 166

CPU module
C24 ready (X1E)
Reception data read request (X3)
Reception abnormal detection (X4)
INPUT instruction
INPUT instruction complete device
INPUT instruction complete device + 1
(normal completion/abnormal
completion)
Receive data count (address: 600
Receive data (addresses: 601
10 - 16
C24
Receive area
Reception (buffer memory)
abnormal
Receive data
detection
count
Receive data
INPUT
instruction
)
H
n
to)
H
When the data of "G" or later in the reception message shown in the figure above is
received normally, the data is stored in the C24 OS area.
The receive data stored in the OS area will be read to the CPU module in the next
read operation.
10 DATA COMMUNICATION USING THE NONPROCEDURAL PROTOCOL
3
Head data
(00H) (03H
A STX
(41H) (02H)
STX A
B
C
(02H) (41H)
(43H) (42H)
E D
Transmission data
(45H) (44H)
ERR LED turns on
Reception abnormal
detection data
Data reception
Reception error causing data
Receive complete
code
B C D E F G H ETX
(42H) (43H) (44H) (45H) (46H) (47H) (48H) (03H)
INPUT
1 scan
3
Receive data
External device
10 - 16