ETAS ES415.1 - Examples; Fig. 4-8 Time-Multiplex Data Transfer between an ES400 Module Chain and a PC; Fig. 4-9 Transfer Scheme for Example 1 (Simplified, Not True to Scale); Fig. 4-10 Time-Multiplex Data Transfer between an ES400 Module Chain and a PC

ES415.1 - User’s Guide 29
ETAS
4.4.3 Examples
Example 1
Fig. 4-8 on page 29 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. 4-9 on page 29.
Fig. 4-8 Time-Multiplex Data Transfer Between an ES400 Module Chain and a PC
Fig. 4-9 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. 4-9 on page 29).
Independently of this, control variables can be transferred at the same time from the PC to the modules.
Control variables
Measured
values M 1
Rate: 10 kHz
Signal injection
Signal extraction
Fr am e
Generat or
(inakt iv)
M ODULE 1
Control variables
Measured
values M 2
Rate: 10 kHz
Signal injection
Fr am e
Gen er at or
(inakt iv)
M ODULE 2
Signal extraction
Control variables
Measured
values M 3
Rat e: 10 kHz
Signal injection
Signal ext ract ion
Fr am e
Gen er at or
(10 kHz)
MODULE 3
Et h e r n et
100 Mbit /s
PC
Et hernet Frame 1
M3 M2 M1H R M3 M2 M1H RM3 M2 M1H R
t [µs]
2000 100
Et hernet Frame 2
Et hernet Frame 65536
Periode Frame Generat or
M3 M2 M1H R
Et hernet Frame 3
M3 M2 M1H R
Et hernet Frame 4
M3 M2 M1H R
Et hernet Frame 5
300
500
400
H UDP/IP Header
R
Reserved for additional
com m un icat io n
Mn Measured values of module n