Lenze 8400 TopLine - Manual (Page 830)

13 Fieldbus interface (MCI)
13.1 Process data transfer
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Lenze · 8400 TopLine · Reference manual · DMS 6.0 EN · 06/2014 · TD05/TD14
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13.1 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.
[13-1] External and internal data transfer between bus system, drive controller and function block interconnection
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