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(2) Function
(a) RIRD instruction overview
The instruction reads data by the specified number of words (control data ((S)+4)) from the target station start
device (control data ((S)+2 and (S)+3)) into the own station word devices (after (D1)).
Specify the target stations in control data ((S)+1).
When the reading of target station data is completed, the completion device (D2) turns on.
(b) Target stations that can be specified
For details on target stations which can be specified, refer to the following.
Page 239, Section 10.1 (2)
(c) Checking the execution status of the RIRD instruction
The execution status (completion or error) of the RIRD instruction can be checked using the following devices
specified in the setting data.
• Completion device (D2)
This device turns on in the END process of the scan where the RIRD instruction is completed and turns off
in the next END process.
• Completion status indication device ((D2)+1)
If the RIRD instruction fails, this device turns on in the END process of the scan where the RIRD
instruction is completed and turns off in the next END process.
RIRD
(S)+2
(S)+3
(D1)
CPU module
[Own station] [Target station]
Master/local
module
CPU module Master/local
module
Receive
buffer
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