Mitsubishi Electric MELSEC Q Series Reference Manual page 339

The number of resends ((S1)+7) must be set every time an instruction is executed.
Remark
When the READ instruction is executed with specification of 961 words or more, data are fragmented in units of 961 words,
and are read from the target station.
To perform the next processing after confirming the read completion on the target station, use the SREAD instruction.
(3) Function
(a) READ instruction overview
The READ instruction reads out word device data (in and after (S2)) of the target station to word devices of the
own station (in and after (D1)).
The target station is specified in Target station network No. ((S1)+4) and Target station No. ((S1)+5) of control
data.
Upon completion of reading the target station devices, Completion device (D2) turns ON.
[Own station]
CPU module
(D1)
READ
(b) Target stations available for specification
• Target network
In addition to CC-Link IE Controller Network, stations in the following networks can be also specified.
• CC-Link IE Field Network
• MELSECNET/H
• MELSECNET/10
• Ethernet
• Target station's CPU type
The READ instruction is executable only when the target station is QCPU, RCPU, LCPU, or QnACPU.
The READ instruction is not executable to the ACPU connected to MELSECNET/10 or Ethernet.
[Target station]
CC-Link IE Controller
Network module
(S2)
Channel 1
Channel n
Channel 10
CHAPTER 9 DEDICATED INSTRUCTIONS
Network
CPU module
module
337
9