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MELSEC-Q
10 DEVICES
10.4 Link Direct Devices (J \ )
(1) Definition
(a) At END processing of sequence program, a data refresh (data transfer) is
performed between the High Performance model QCPU and the
MELSECNET/H network modules. Link direct devices are used to directly
access the link devices in the MELSECNET/H network modules.
(b) Designation method
• Link direct devices are designated by network No. and device No.
Designation method: J \
Device No.
Input...........................X0
Output........................Y0
Link relay.................. B0
Link register...............W0
Link special relay.......SB0
Link special register ..SW0
Network No.(1 to 239)
• For link register 10 (W10) of network No.2, the designation would be
"J2\W10"
K100 J2\W10
MOVP
Network modules at network No.2
W 0
W10
• For a bit device (X, Y, B, SB), digit designation is necessary.
Designation example : J1\K1X0, J10\K4B0
(2) Designation range
Link direct device designations are allowed for all the link devices in network
modules.
Device outside the range specified by the network refresh
parameters can also be designated.
(a) Writing
1) Writing is executed within that part of the link device range set as the
send range in the common parameters of the network parameters that
is outside the range specified as the "refresh range" in the network
refresh parameters.
Refresh
range
High Performance model QCPU
Network module
LB 0
B 0
send range
Link range
Writing range
