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Basic
function
RAS function
Output status setting on
remote I/O stations at system
failure due to a master station
error
Holds or resets the outputs of remote I/O stations when the
CPU module of the remote master station is down.
<Difference in comparison with the MELSECNET/10 remote
I/O station>
The output status at error is set in PLC parameter for the
MELSECNET/H (MELSECNET/10 mode) remote I/O
station using GX Developer.
For details, refer to Page 49, Section 5.1.
Automatic return function
Automatically reconnects a disconnected station in the data
link after the error is cleared and the station is back to
normal.
Loopback function (optical
loop system)
Switches the transmission path when an error occurs in a
transmission path to cut off the error point, and continues
transmission between the normal stations.
Station cutoff function (coaxial
bus system)
Continues communications between other normal stations
even when a connected station is powered off.
Transient transmission
enabled even at CPU module
error
Enables the network modules to continue transient
transmission even if an error which stops the operation of
the CPU module while the system is in operation occurs.
Offline test
Hardware test
Checks the internal components of a network module.
<Difference in comparison with the MELSECNET/10 remote
I/O station>
The following points differ on the MELSECNET/H
(MELSECNET/10 mode) remote I/O station.
• The number set with the mode setting switch
• Error details check methods: using GX Developer or in
the link special register (SW00AC, SW00AD)
For details, refer to Page 42, Section 4.3.3.
Self-loopback
test
Checks the internal circuits including the send/receive
circuits of a network module together with the connected
cable.
<Difference in comparison with the MELSECNET/10 remote
I/O station>
The following points differ on the MELSECNET/H
(MELSECNET/10 mode) remote I/O station.
• The number set with the mode setting switch
• Error details check methods: using GX Developer or in
the link special register (SW00AC, SW00AD)
For details, refer to Page 40, Section 4.3.1.
Function Description Availability