Fb Operation; Data Communication Method - Mitsubishi Electric MELSEC-Q-MR-JE-C Reference Manual

2.3

FB Operation

Data communication method

To control the devices connected with CC-Link IE Field Network Basic, the control information is transmitted to and received
from the connected devices though the RX/RY/RWr/RWw register. The FBs described in this manual execute reference and
updating of the device specified in the link refresh setting.
Defining the contents that the customer sets in the link refresh setting to the global label enables the FBs to access the device
specified in the link refresh setting. The data is exchanged between the QCPU and the MR-JE-C in the fixed cycle by using
the set device.
QCPU
Read area
Write area
Device
FB reads the data after the global labels
related to RX and RWr are set.
Read area
MR-JE-C
Link
refresh
Read
FB
QCPU
Read area
Write area
Device
FB writes the data after the global labels
related to RY and RWw are set.
2 FUNCTION DESCRIPTION
Write area
MR-JE-C
Link
refresh
Write
FB
2.3 FB Operation
2
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