ETAS ES420.1, Руководство пользователя, Страница: 26 / 100

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4.5.3 Examples
4.5.3.1 Example 1
Fig. 4 - 4 on page 26 shows an example of an application with three concatenated ES400 modules with the same acquisition rates. The transfer
scheme for this configuration is shown in Fig. 4 - 5 on page 26.
Fig. 4 - 4 Time-Multiplex Data Transfer Between an ES400 Module Chain and a PC
Fig. 4 - 5 Transfer Scheme for Example 1 (Simplified, Not True to Scale)
In this example, the third module periodically generates 2
16
(65536) time slices each 100 microseconds long. Modules 1, 2 and 3 acquire measure -
ments with the same rate of 10 kHz each. Module 1, Module 2 and Module 3 link their measurements to each time slice (see Fig. 4 - 5 on page 26).
Independently of this, control variables can be transferred at the same time from the PC to the modules.
Stellgrößen
M essdat en
M 1
Rat e: 10 kHz
Einkoppler
Auskoppler
Frame
Generat or
(inakt iv)
MODUL 1
St ellgrößen
M essdat en
M2
Rate: 10 kHz
Einkoppler
Auskoppler
Frame
Generator
(inaktiv)
M ODUL 2
Stellgrößen
M essdaten
M 3
Rat e: 10 kHz
Einkoppler
Auskoppler
Frame
Generat or
(10 kHz)
M ODUL 3
Ethernet
100 Mbit/s
PC
Et hernet-Frame 1
M 3 M 2 M1 H R M 3 M2 M1 H R M3 M 2 M 1 H R
t [µs]
200 0 100
Et hernet -Frame 2 Et hernet -Frame 65536
Periodendauer Frame-Generat or
M3 M 2 M 1 H R
Et hernet -Frame 3
M 3 M2 M 1 H R
Et hernet -Frame 4
M3 M 2 M 1 H R
Et hernet -Frame 5
300 500 400
H UDP/IP Header
R
Reserviert für zusät zliche
Kommunikat ion
Mn M essdat en von Modul n