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4.3 RAS Functions
4.3.1 Automatic return function
4
FUNCTIONS
4.3 RAS Functions
This chapter explains the RAS functions.
4.3.1 Automatic return function
When a local station disconnected due to a data link error is recovered, this function allows
the station to automatically return to the network and to restart data link.
The automatic return function is set by the mode setting switch of each link module.
Section 5.3 Part Names and Settings
Conditions for reconnecting a disconnected station vary depending on whether the
automatic return function is supported or not, as shown below.
(1) When data link is interrupted due to an error in a master station
(2) When a station is disconnected due to an error occurred in the station
Table 4.2 Conditions for reconnecting a disconnected station depending on whether
the automatic return function is supported or not
Automatic return function
Conditions for reconnecting a disconnected station (local station)
Master station Local station
Supported
Supported Automatically reconnected after the faulty part of the master station is corrected.
Not supported
Take actions to correct the faulty part of the master station.
Reset the master station, and then the disconnected station.
Not supported
Supported Automatically reconnected after the faulty part of the master station is corrected.
Not supported
Take actions to correct the faulty part of the master station.
Reset the disconnected station, and then the master station.
Table 4.3 Conditions for reconnecting a disconnected station depending on whether
the automatic return function is supported or not
Automatic return function
Conditions for reconnecting a disconnected station (local station)
Master station Local station
Supported
Supported Automatically returns after the faulty part of the disconnected station is corrected.
Not supported
Take actions to correct the faulty part of the disconnected station.
Reset the disconnected station.
Not supported
Supported Take actions to correct the faulty part of the disconnected station.
Not supported
Reset the disconnected station and the local station without automatic return
function, and then the master station.