Mitsubishi QCPU (Q Mode) User Manual

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MELSEC-Q
16 COMMUNICATION BETWEEN CPU MODULES IN MULTIPLE PLC
SYSTEM
3) An outline of the operations when the automatic refresh function is
divided into four ranges (Setting 1: Link relay (B), Setting 2: Link
register (W), Setting 3: Data register (D), Setting 4: Internal relay (M))
and then performed is shown in the illustration below.
Setting 1
B0
to
Setting 2
W0
Setting 3
D0
Setting 4
M0
Device
PLC No.2
PLC No.2 transmission
data (No.1)
Maximum
2 k words
Other PLC's
shared memory
User's free area
CPU shared memory
PLC No.1
Reading performed
with the PLC No.1
END process
Writing during the
END process
Writing during the END process
Writing during the END process
Writing during the END process
Maximum
8 k words
PLC No.3
PLC No.2 transmission
data (No.2)
PLC No.2 transmission
data (No.3)
PLC No.2 transmission
data (No.4)
Maximum
2 k words
PLC No.3 transmission
data (No.1)
PLC No.3 transmission
data (No.2)
PLC No.3 transmission
data (No.3)
PLC No.3 transmission
data (No.4)
PLC No.4
Maximum
2 k words
PLC No.4 transmission
data (No.1)
PLC No.4 transmission
data (No.2)
PLC No.4 transmission
data (No.3)
PLC No.4 transmission
data (No.4)
PLC No.1
transmission
data (No.1)
PLC No.2 reception
data (No.1)
PLC No.3 reception
data (No.1)
PLC No.4 reception
data (No.1)
PLC No.1
transmission
data (No.2)
PLC No.2 reception
data (No.2)
PLC No.3 reception
data (No.2)
PLC No.4 reception
data (No.2)
PLC No.1
transmission
data (No.3)
PLC No.2 reception
data (No.3)
PLC No.3 reception
data (No.3)
PLC No.4 reception
data (No.3)
PLC No.1
transmission
data (No.4)
PLC No.2 reception
data (No.4)
PLC No.3 reception
data (No.4)
PLC No.4 reception
data (No.4)
PLC No.1
transmission
data (No.1)
PLC No.1
transmission
data (No.2)
PLC No.1
transmission
data (No.3)
PLC No.1
transmission
data (No.4)
Maximum
2 k words
(3) Precautions
(a) Device ranges set for the use of the automatic refresh function cannot be
set in local devices.
If the device ranges set for the use of the automatic refresh function are set
in local devices, the settings will not be reflected back onto the refresh data.
(b) Do not set devices for the use of the automatic refresh function in the file
register of all programs.
If devices for the use of the automatic refresh function are set in the file
register of all programs, automatic refresh will be performed on the file
register that corresponds with the last scan execution type program
executed.

Mitsubishi QCPU (Q Mode) Specifications

General

Brand	Mitsubishi
Model	QCPU (Q Mode)
Category	Controller
Language	English