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31
Application Precautions
Section 1-5
• 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
on page 18. 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 20.
• The CS1W-CLK23, CJ1W-CLK23, and 3G8F7-CLK23-E support up to
4,000 send words per node, but no more than 1,000 send words per node
can be set if any other model of Controller Link Unit or Support Board is
used in the same network.
• If the total number of data link words is increased, the PLC cycle time and
the communications cycle time will be increased. In that case, observe
the following precautions.
• Check to make sure that it will not cause problems if performance in
responses to external devices is reduced.
• In message communications, extending the communications cycle
time may result in timeout errors waiting for responses.
In that case, lengthen the response monitor time as described below.
SEND, RECV, and CMND instructions:
Response monitor time setting area for local node control data.
For details, refer to
PLC Programming Devices:
PLC Programming Device
Response Timeout
setting
For details on settings, refer to the operation manual for the PLC
Programming Device that is being used.
Summary of Contents for C200HW-CLK21
Page 3: ...iv ...
Page 9: ...x ...
Page 12: ...xiii TABLE OF CONTENTS Index 367 Revision History 373 ...
Page 13: ...xiv ...
Page 19: ...xx ...
Page 57: ...32 Application Precautions Section 1 5 Example CX Programmer Response Timeout Setting ...
Page 69: ...44 Message Service Procedure Section 2 2 ...
Page 111: ...86 Constructing Networks with Repeater Units Section 3 4 ...
Page 154: ...129 Setting Data Links Section 5 2 Device Information Setting Data Link Tables ...
Page 261: ...236 Response Codes Section 6 7 ...
Page 297: ...272 Message Delay Times Section 8 4 ...
Page 353: ...328 Handling Precautions Section 9 6 ...
Page 364: ...339 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Page 365: ...340 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Page 369: ...344 Standard Models Appendix A ...
Page 391: ...366 Using the Relay Terminal Block Appendix C ...
Page 397: ...372 Index ...
Page 401: ...376 Revision History ...