Mitsubishi Electric MELSEC-Q Series User Manual page 224

(2) Control data
Device Item
(S1) + 0 Completion status
(S1) + 1 Station number
(S1) + 2 Send data size
(S1) + 3 Receivable data size
(S1) + 4 Receive data size
(a) Send data size
CPU module
Size
specified
in (S1)+2
When the send data size ((S1)+2) is an odd number of bytes, the low byte of the last data is sent as the last
byte.
CPU module
The low byte of
the last data
is sent.
222
Setting data
Stores the status when the instruction is completed.
0: No error (normal completion)
Value other than 0: Error code
Specify the station number of the remote device station.
Specify a send data size (in bytes).
Specify the maximum size of the device that stores received data (in
bytes).
The size of received data (in bytes) is stored.
Master station
Device Send
memory data
Master station
Device Send
memory data
Setting range

1 to 64
1 to 255
( Page 222,
Section 9.9 (2)
(a))
0 to 255
( Page 223,
Section 9.9 (2)
(b))
0 to 255
( Page 223,
Section 9.9 (2)
(b))
Remote device station
Request
Remote device station
Request
Set by
System
User
System