App
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Appendix 4 Comparison between CC-Link IE controller network and MELSECNET/H
Appendix 4.2 Comparison of function
APPENDICES
Appendix 4.2 Comparison of function
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
: compatible,
: partially changed, — : incompatible
Table App.14 Comparison of cyclic transmission functions
Function
Compatibility
Precautions for replacement
Cyclic transmission
Communication by LB/LW
None
Communication by LX/LY
None
Refresh
Link refresh
None
Direct access to link devices
None
Assurance of cyclic
data integrity
32-bit data assurance
None
Station-based block data assurance
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
supplementary setting, station-based block
data assurance can be made to both send and
receive data.
Constant link scan
None
Low-speed cyclic transmission
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).
Reserved station specification
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
Network Diagnostics
• Writing parameters from another station in
the case of erroneous parameter setting
• Monitoring other stations by GX Developer
• Dedicated instructions
When disconnecting a reserved station from a
network, set the mode of the station to "Offline".
Interlink transfer
None
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