ETAS ES441.1 - Examples; Fig. 4-7 Time-Multiplex Data Transfer between an ES400 Module Chain and a PC; Fig. 4-8 Transfer Scheme for Example 1 (Simplified, Not True to Scale); Fig. 4-9 Time-Multiplex Data Transfer between an ES400 Module Chain and a PC

ES441.1 - User’s Guide 28
ETAS
4.4.3 Examples
Example 1
Fig. 4-7 on page 28 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. 4-8 on page 28.
Fig. 4-7 Time-Multiplex Data Transfer Between an ES400 Module Chain and a PC
Fig. 4-8 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
measurements with the same rate of 10 kHz each. Module 1, Module 2 and Module 3 link their measurements to each time slice (see
Fig. 4-8 on page 28).
Independently of this, control variables can be transferred at the same time from the PC to the modules.
Stellgrößen
Messdaten
M1
Rate: 10 kHz
Einkoppler
Auskoppler
Fr am e
Generat or
(inakt iv)
M ODUL 1
Stellgrößen
Messdat en
M2
Rate: 10 kHz
Einkoppler
Auskoppler
Fr am e
Gen er at or
(inakt iv)
MODUL 2
Stellgrößen
M e ssd at e n
M3
Rat e: 10 kHz
Einkoppler
Auskoppler
Fr am e
Gen er at or
(10 kHz)
MODUL 3
Et h e r n et
100 Mbit /s
PC
Et h er n et -Fr am e 1
M3 M2 M1H R M3 M2 M1H RM3 M2 M1H R
t [µs]
2000 100
Ethernet-Frame 2
Et hernet-Frame 65536
Periodendauer Frame-Generator
M3 M2 M1H R
Et he r n e t -Fr am e 3
M3 M2 M1H R
Et he r n et -Fr a m e 4
M3 M2 M1H R
Et he r n et -Fr a m e 5
300
500
400
H UDP/IP Header
R
Reserviert für zusätzliche
Komm unikat ion
Mn Messdaten von Modul n