Omron CVM1-CLK21, Руководство по эксплуатации

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C200HX/HG/HE Controller Link Units Section 4-3
Note The factory default setting is shown in bold.
Note Set the same baud rate for all the nodes on the Network. Normal communica-
tion cannot be performed unless the same baud rate is set for all the nodes.
Setting the Operating
Level (Pin 4) With C200HX/HG/HE PCs, Networks can be constructed by mounting up to
two Communications Units, such as Controller Link Units, SYSMAC LINK
Units and SYSMAC NET Link Units for the same PC Each of these Units must
run on a different operating level.
Set the Controller Link Unit to operating level 1 or 0 using DIP switch pin 4 on
the front of the Unit.
Note 1. Do not use the same operating level for more than one Unit mounted to the
same PC. An error will occur is the same operating level is set twice.
2. Operating levels are used by the CPU Unit to distinguish different Commu-
nications Units. Each node can have a different operating level, i.e., it is not
necessary to use the same operating level for all nodes in the same Net-
work.
4-3-4 Terminating Resistance
Turn ON the terminating resistance using the switch on the bottom of the Unit
for the Units of both ends of the Network. The terminating resistance is
required at both ends of a Network to absorb unnecessary signals and reduce
noise.
The Controller Link Unit has built-in terminating resistance, which can be con-
nected simply by turning ON the slide switch.
Note 1. Always turn OFF the PC’s power before setting the terminating resistance
switch.
2. Turn ON the switch to connect terminating resistance at the nodes at both
ends of the Network and turn OFF the switch at all other nodes. Normal
communication cannot be performed in the Network unless all the nodes
are set properly.
Pin 4 Operating level Node
OFF (factory default) Operating level 1 Set all the nodes on the
Network to either Operat-
ing level.
ON Operating level 0
Operating level 0
Operating level 1
Operating level 0
Operating level 1
Note It is not necessary to use the same operating
level for all nodes in the same Network.
Bottom switch Terminating resistance
OFF (factory default) Not connected.
ON Connected.
ON