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106
Repeater Units
Section 4-6
See pages 16 and 81 for details on the maximum transmission distance.
Note
1.
Always turn OFF power to the Repeater Unit before setting the baud rate.
2.
Set the same baud rate for all nodes on the network.
Normal communications throughout the entire network will not be per-
formed if the baud rate of even a single node differs from the others.
3.
The factory default setting is 2 Mbps.
4-6-3
Terminating Resistance
Turn ON the terminating resistance at the Unit located at each end of the net-
work. The terminating resistance switch is located on the front of the Unit. The
terminating resistance is required at both ends of a network, or both ends of a
segment, to absorb unnecessary signals and reduce noise.
When a Repeater Unit is located at either end of the Network, turn ON the ter-
minating resistance switch of the Repeater Unit.
Terminating Resistance Switch for Communications Cable Terminal Block SL1 and SL2
Note
The numbers 1 and 2 on the switch are in reverse order, so make sure the
switch is set correctly.
Note
1.
Always turn OFF power to the Repeater Unit before setting the baud rate.
2.
Turn ON the switch at the node located at each end of the network to con-
nect terminating resistance and turn OFF the switches at all other nodes
to disconnect terminating resistance. Normal communications throughout
the entire network will not be performed if the terminating resistance of
even one node differs from the others.
3.
The factory default setting is OFF (terminating resistance not connected).
O N
1
2
TER SW
SL2 (See note.)
ON
TER SW
SL1 (See note.)
Switch
Terminating resistance
OFF (default)
Not connected
ON
Connected
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 ...