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4.3 RAS Functions
4.3.1 Control station switching function
4
FUNCTIONS
4.3
RAS Functions
This section explains the RAS functions.
4.3.1
Control station switching function
Even if the control station goes down, a normal station (sub-control station) takes over the
control to continue data link.
POINT
(1) While the control station status is switched, data link stops for a period of a
data link monitoring time (up to two seconds).
Section 6.3 Network Range Assignment
Data immediately before the stop are held during data link stop.
(2) While data link is stopped, the own station identifies all other stations as
faulty.
(3) Even if cyclic transmission of the control station is stopped by GX Developer,
the control station status is not switched.
Section 4.1.11 Stop/restart of cyclic transmission
(4) The control station status can be switched to a normal station where cyclic
transmission has stopped by GX Developer.
Section 4.1.11 Stop/restart of cyclic transmission
Figure 4.48 Control station switching function
Switching
Control station
No.1
Sub-control station
No.2
Normal station
No.4
Normal station
No.3
Down
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