Appendix 4.2 Comparison Of Function - Mitsubishi Electric MELSEC Q Series Reference Manual

Appendix 4.2
The following describes the comparison of functions between the CC-Link IE Controller Network and the
MELSECNET/H.
(1) Comparison of function with MELSECNET/H
The transmission of the CC-Link IE Controller Network is made by the optical loop system only.
When the coaxial bus system is used in the MELSECNET/H, consider to replace it with an optical loop system.
The following shows the comparison of functions of an optical loop system in the CC-Link IE Controller Network
and the MELSECNET/H.
(a) Comparison of cyclic transmission functions
Function
Communication using LB/LW
Cyclic transmission
Communication using LX/LY
Link refresh
Refresh
Direct access to link devices
32-bit data assurance
Assurance of cyclic
data integrity
Station-based block data assurance
Constant link scan
Low-speed cyclic transmission
Reserved station specification
Interlink transmission
Comparison of function
Compatibility
: compatible, : partially changed, —: incompatible
Precautions for replacement
None
None
None
None
None
The send data and the receive data are set as
one setting in the CC-Link IE Controller
Network module.
When marking a check at "Block data
assurance per station is available" in the
supplementary setting, station-based block
data assurance can be made to both send and
receive data.
None
The low-speed cyclic transmission function is
not available for the CC-Link IE Controller
Network module.
Assign the low-speed cyclic transmission
range to the LB/LW setting (2).
When a reserved station actually exists on a
network, transient transmissions are
executable to the station.
In other words, the following are available for
the station.
• Checking error details by CC IE Control
diagnostics
• Writing parameters from another station in
the case of erroneous parameter setting
• Monitoring other stations with a
programming tool
• Dedicated instructions
When disconnecting a reserved station from a
network, set the mode of the station to
"Offline".
None
APPENDICES
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