Rockwell Automation 2708-DH5B2L_DH5B4L Attended Workstation - Manual (Page 72)

Chapter 7
Network Design
7–2
All of the workstations, including Masters, Concentrators and Submasters,
are standard workstations which have been configured for their individual
roles in the network. A configuration parameter is changed to allow any
workstation to adopt a new role in the network. Each workstation is capable
of operating in both a data collection and data communications mode.
An example of a large network configuration follows:
Figure 7.2
Large Network Configuration
Host M—W—C—W—C—W—C—W—W—C—C—W
W
|
W
|
W
|
S
|
W
|
W
|
S
|
|
S
|
W
|
W
|
W
|
W
|
S
|
W
|
W
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W
|
S
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W
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W
Indicates RS-232 connect
Indicates RS-485 backbone
Indicates a tributary W Workstation
S Submaster
C Concentrator
M Master
Key:
A workstation which is being used as a Master, Concentrator or Submaster
can perform data collection functions even while serving in the
communications network.
Note: All references to RS-232 should be understood to mean RS-422 if the
workstation’s COM1 port was ordered as RS-422.
Network Installation of
More than 32 Workstations
(cont’d)