Mitsubishi Electric MELSEC iQ-R Series User Manual page 68

CPU module
Reception
abnormal
detection
INPUT
instruction
Module READY (X1E)
Reception data read request (X3)
Reception abnormal detection (X4)
INPUT instruction
INPUT instruction completion device
INPUT instruction completion device + 1
(normal completion/abnormal
completion)
Receive data count (Un\G1536)
Received data (from Un\G1537)
When the data of "G" or later in the reception message shown in the above figure is received normally, the data is stored in the
C24 OS area.
The received data stored in the OS area will be read to the CPU module in the next read operation.
3 DATA COMMUNICATION USING NONPROCEDURAL PROTOCOL
66
3.1 Receiving Data from Target Device
C24
Reception area
(buffer memory)
3
Receive data
(00 ) (03
H H
count
A STX
(41 ) (02
H H
C B
(43 ) (42
H
H
E D
Received data
(45 ) (44
H H
n
ERR LED turns ON
Reception abnormal
detection data
Data reception
Reception error occurred data
Head data
)
)
S
A B C D
T
X
)
(02 ) (41 ) (42 ) (43 ) (44 ) (45
H H H H H
)
Transmitted data
INPUT
3
Received data
Receive complete code
Target device
E
E F G H
T
X
) (46 ) (47 ) (48 ) (03 )
H H H H H
1 scan