Mitsubishi Electric MELSEC-Q Series User Manual page 156

(2) Function
(a) SREAD instruction overview
The instruction reads data by the specified number of words (control data
((S1)+9)) from the target station start device (S2) into the own station word
devices (after (D1)).
Specify the target stations in control data ((S1)+4 and (S1)+5).
When the reading of the data specified in (S2) is completed, the following devices
are turned on.
• Own station: Completion device (D2)
• Target station: Read notification device (D3)
[Own station]
CPU module
(D1)
(b) Target stations which can be specified
For details on target stations which can be specified, refer to the following.
Refer to Section 10.1 (1).
(c) Checking the execution status of the SREAD instruction
The execution status (completion or error) of the SREAD instruction can be
checked using the following device specified for the setting data.
• Completion device (D2)
It is turned on in the END processing of the scan after completion of the
SREAD instruction, and is turned off in the next END processing.
• Completion status indication device ((D2)+1)
It is turned on in the END processing of the scan after completion of the
SREAD instruction, and is turned off in the next END processing only if the
SREAD instruction fails.
Chapter 10 DEDICATED INSTRUCTIONS
Simple Motion module
SREAD
Channel 1
Channel 2
10 - 18
[Target station]
Head module
(S2)