Mitsubishi Electric L26CPU-BT User Manual page 239

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
(1) Send data size
Programmable controller CPU
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.
Programmable controller CPU
The low byte of
the last data
is sent.
Set data
Stores the status when the instruction is complete.
0: No error (normal completion)
Other than 0: Error code
Specifies the station number of the remote device station.
Specifies a send data size (in bytes).
Specifies the maximum size of the device that stores received data (in
bytes).
Stores the size of received data (in bytes).
Master station
Device Send
memory data
Master station
Device Send
memory data
CHAPTER 9 DEDICATED INSTRUCTIONS AND PROGRAMMING
Remote device station
Request
Remote device station
Request
Setting
Set by
range

System
1 to 64
1 to 255
User
0 to 255
 System
237
9