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1.1 Features
1
OVERVIEW
(c) When a station disconnected from a network due to a data link error recovers from
the error, the station is automatically reconnected to the network and restarts data
link. (Automatic return function)
This automatic return does not affect data link.
(d) A cable fault can be detected as a cause of a communication error. (Cable fault
detection function)
Figure 1.13 Automatic return function
Figure 1.14 Cable fault detection function
When recovered
from fault
Control station
No.1
Normal station
No.2
Normal station
No.4
Normal station
No.3
Control station
No.1
Normal station
No.2
Normal station
No.4
Normal station
No.3
Reconnected
Down
Control station
No.1
Normal station
No.4
Normal station
No.3
Normal station
No.2
A cable fault is detected as the
cause of the communication error.
Communication
error
Communication
error
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