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4
FUNCTIONS
(2) When the punctuality assurance setting is enabled
Link scan time
Link scan time is constant since each station sends
a specified number of transient transmissions.
(3) Setting the punctuality assurance and the number of transient
4
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4.1 Cyclic Transmission Function
4.1.6 Cyclic transmission punctuality assurance
Each of stations performs the specified number of transient transmissions in one link
scan to keep the link scan time constant, and the punctuality of cyclic transmission is
ensured.
(a) When the actual number of transient transmissions is less than the specified one
Dummy data are sent to cover the shortfall.
(b) When the actual number of transient transmissions exceeds the specified one
They are divided and transmitted in several link scans.
Control station
Normal station
No.1
No.2
Request
Figure 4.31 With punctuality assurance
transmissions
Set the punctuality assurance and the number of transient transmissions by the
control station's [Network range assignment] - [Supplementary setting].
Section 6.3.6 Supplementary settings
Enable [Punctuality is guaranteed], and set a value for [Maximum No. of transients in
one station].
Normal station
Normal station
No.3
No.4
Response
Cyclic transmission
Transient transmission
Transient transmission (dummy transmission)
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