11.1
Process data transfer
The process data serve to control the controller. Thus the transfer of the process data is
time-critical.
The process cycle is 1 ms, irrespective of the respectively plugged-in bus system and the
type of drive controller.
Process data transfer takes place cyclically between the master system and the drive
controllers.
– This concerns the continuous exchange of current input and output data.
– In the case of the 8400 drive controller, 16 words per direction are exchanged.
The master computer can directly access the process data.
Access to the process data takes place via the port blocks LP_MciIn and LP_MciOut (see
FB interconnection of the »Engineer«).
These port blocks are also called process data channels.
The process data are not saved in the controller.
[11-1] External and internal data transfer between bus system, drive controller and function block interconnection
Firmware ≤ 11.00 - DMS 6.0 EN - 10/2011
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8400 HighLine C | Reference manual
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Fieldbus interface
Process data transfer
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