Mitsubishi MELSEC LJ71C24, User Manual

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App. - 55 App. - 55
APPENDIXES
Appendix 6 Communication Example when the C24 Is Used Installed to the Head Module
This section explains the parameter setting and programming using system
configuration examples.
For the parameter setting of the head module and details on cyclic transmission, refer
to the following manual.
MELSEC-L CC-Link IE Field Network Head Module User's Manual
MELSEC-Q CC-Link IE Field Network Master/Local Module User's Manual
Appendix 6.1 Restrictions on programming
The following are restrictions when the C24 is used with the head module.
(1) Restrictions on creating programs
When the C24 is used with the head module, instructions for the C24 cannot be
used. Use the X/Y signals.
(2) Restrictions on MC protocol communication
The following shows the commands available when accessing the head module
using MC protocol.
Available function Function
Batch read, batch write
Random read, test (random write)
Monitor data registration, monitor
Device memory
reading/writing
*1
Multiple blocks batch read, multiple blocks batch write
Buffer memory
reading/writing
Reading/writing of the C24 buffer memory
Intelligent function
module buffer memory
reading/writing
Reading/writing of the designated
intelligent function module buffer memory
1 Devices that can be used are different depending on whether the C24 is
connected to a CPU module or head module.
For details, refer to the MELSEC-L CC-Link IE Field Network Head Module
User's Manual.