Mitsubishi Electric MELSEC Q Series Reference Manual page 492

(2) Control data
(a) Control data
Device Item
(S)+0 Completion status
(S)+1 Target station No.
Access code/
(S)+2
Attribute code
(S)+3 Device No.
Number of points
(S)+4
to write
*1 The setting side is as shown below.
User: Before execution of the dedicated instruction, data must be set by the user.
System: The CPU module stores the execution result of the dedicated instruction.
490
Setting data
The instruction completion status is stored.
0: Normal
Other than 0: Error ( Page 511, Section 10.2)
When the target station is other than the CC-Link IE Controller
Network module, refer to the manual for the target station for error
codes.
Specify the station No. of the target station.
Specify the access and attribute codes of the write target device.
b15 to
Access code
Specify the start No. of the device to which data are written.
Specify the size of the data to be written in units of words.
b8 b7 to b0
Attribute code
Setting
Setting range
*1
side
— System
1 to 120 User
Refer to (b) User
Within device range User
1 to 480 User