Communication Function - Mitsubishi Electric Melsec QJ71LP21 Reference Manual

7 APPLICATION FUNCTIONS

7.4.1 Communication function

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(1) Parameter settings
Set the execution conditions for the transient transmission with the parameters
listed below.
In the default settings, both the number of transients that one network can
execute in one link scan ([Maximum no. of transients in 1 scan]) and the number
of transients that one station can execute in one link scan ([Maximum no. of
transients in one station]) are set to 2 times. Change the number of transients
that can be executed in a link scan as necessary (refer to POINT on the bottom
of this page).
Setting item
Maximum no. of transients in 1 scan
Maximum no. of transients in one station
[Screen display]
Click
Network range assignment
Click
Supplementary settings
POINT
(1) By increasing the number of transients, multiple transient instructions can be
executed at the same time (in one link scan).
(2) If the number of transients is increased and the transient request was issued
in each station at the same time, the link scan time becomes temporarily
longer and the cyclic transmission is also affected. Do no set unnecessarily
large values.
(3) When the transient transmission and the low-speed cyclic transmission are
used at the same time, these transient setting parameters limit the total
number of transient and low-speed cyclic transmissions.
Setting value
Valid setting times
1 to 255 times
1 to 10 times
Transient setting
MELSEC-Q
Default setting
Twice
Twice
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