Omron CQM1H-CLK21 - Manual (Page 52)

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Application Precautions Section 1-5
• The Wired Network 62 Node Enable Bit in the DM Parameter Area soft-
ware switches of CS1W-CLK21-V1 and CJ1W-CLK21-V1 Units is read
when the Unit is restarted.
• When using automatic data link creation with 1:N allocation, all nodes
must be CS1W-CLK21-V1 or CJ1W-CLK21-V1 Controller Link Units.
Other models cannot participate in data links that employ 1:N allocations.
• Communicate between the CPU Unit and Communications Units by exe-
cuting the SEND(090), RECV(098), and CMND(490) instructions for the
internal logic ports (8 ports max.). Up to eight Controller Link Units can be
connected to a single CPU Unit with unit version 1.2 or later. Perform
exclusive control of the ports using the ladder program when using the
SEND(090), RECV(098), and CMND(490) instructions to perform mes-
sage servicing on multiple networks (Units).
• Up to 20,000 data link send and receive words can be allocated per node
(Unit) when using unit version 1.2 or later. Data of 20,000 words is divided
and refreshed across three CPU Unit cycles. Make sure that the response
time has been considered in the system design. (Data is synchronous for
each node when data is refreshed in the CPU Unit, in the same way as for
earlier versions. If the number of data link words is 12,000 words or less,
the response with earlier unit versions (pre-Ver. 1.2) is exactly the same.)
• For details on Controller Link Unit current consumption, refer to Controller
Link Unit Models and PLCs on page 16 . For details on current consump-
tion of each Unit, refer to the operation manual of the PLC that is being
used. For an example of calculating current consumption, refer to
page 18.