Beckhoff FM33xx Manuel d'utilisateur télécharger pdf (Page 30)

I/O configuration

FM33xx 25

Multiplex mode channel data in the

TwinCAT System Manager

The channel data of a TC-Plug module is mapped and displayed as follows

in the TwinCAT System Manager, independently of the number of channels

that are configured (associated):

Process data for the TC-

Plug modules in the

TwinCAT System Manager

Control/status byte and

channel data for the 4

thermocouple inputs

In order to reduce the quantity of data that has to be transferred over the

fieldbus, the thermocouple input data for a maximum of 4 channels only

(e.g. for channels 0 to 3) is transferred over the fieldbus in any one fieldbus

cycle. The control/status byte can be used to request the analog values of

another 4 channels (e.g. for channels 4 to 7, 8 to 11 etc.).

Control/status

byte

Channel

data

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 38 39

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Beckhoff FM33xx Manuel d'utilisateur Page 30