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MELSEC-Q
7 APPLICATION FUNCTIONS
7.5 Return Sequence Station Number Setting Function
Master Remote
The remote I/O net can set the number of stations for which stations with
communication errors during one link scan can perform return sequence. If the
number of stations set is large, a large number of communication stations with errors
can perform return sequence. However, link scan during return sequence will take
longer than a normal link scan so care must be taken to lengthen the link scan to
match if the setting for return sequence is increased.
(Normally there is no problem using the default settings.)
The maximum number of return sequence stations is set in the supplementary settings
for the common parameters.
The setting range is 1 to 64 stations.
The default is set to 2 stations.
7.6 Reserved Station Function
Master Remote
The reserved station designation is a function that handles stations to be connected in
the future as stations with communication errors. (These stations are not actually
connected, but they are included in the total number of stations (remote) in the
network.)
Since reserved stations do not affect scan time, full performance can be realized even
when they remain reserved.
Reserved stations are set in the common parameters.