Mitsubishi Electric MELSEC iQ-R Series, Programming Manual

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15 NETWORK COMMON INSTRUCTIONS
15.2 CC-Link Dedicated Instructions
Processing details
• These instructions read the number of words of data specified by (s)+4 from the start device of the target station specified
by (s)+2 and (s)+3, and put the data in the word device in the own station specified by (d1) and after. Specify the target
station in (s)+1. Upon completion of reading the data from the target station, the completion device specified by (d2) turns
on.
• The execution status and the completion status of the RIRD instruction can be checked with the completion device (d2) and
the completion status indication device (d2)+1.
• The following figure shows the execution timing of the RIRD instruction.
• Completion device (d2)
This device turns on during END processing of the scan where the RIRD instruction completes, and turns off during the next END processing.
• Completion status indication device (d2)+1
This device turns on or off depending on the completion status of the RIRD instruction.
When completed successfully: The device remains off.
When completed with an error: The device turns on during END processing of the scan where the RIRD instruction completes, and turns off during the next END
processing.
• When completed successfully
RIRD
(d1) (s)+2
(s)+3
Receive buffer
CPU module CPU module Network module Network module
[Own station] [Target station]
100
100
END 0 END 0 END 0 END 0 END 0
END 0 END 0 END 0 END 0 END 0
OFF
OFF OFF
OFF
ON
ON
OFF
RIRD
Sequence scan
Start contact
CPU module on
the own station
CPU module on
the target station
Network
module
Network
module
Completion device
(d2)
Completion status
indication device
(d2)+1
Device for storing
the read device (d1)
Sequence scan
Device where the
read data is stored
(s)+2, (s)+3
1 scan
Send buffer Receive buffer