Lenze E84DGFCR - Manual (Page 38)

Communication manual 8400 motec PROFINET
Data transfer
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EDS84DMOTPNET EN 2.0 - 11/2011
7 Data transfer
PROFINET transmits parameter data, configuration data, diagnostic data, alarm messages,
and process data between the host (I/O controller) and the controllers that are part of the
fieldbus (I/O devices). Depending on their time-critical behaviour, the data are transmitted
via corresponding communication channels.
Communication channels
 The process data channel transmits process data.
– With the process data the controller is actuated.
– Transferring process data is time-critical.
– Process data are transmitted cyclically between the I/O controller and the I/O
devices that are part of the fieldbus according to the Provider/Consumer model
(continuous exchange of current input and output data).
– The I/O controller can directly access the process data. In the PLC, for instance, the
data are directly assigned to the I/O area.
– The Inverter Drive 8400 motec can exchange a maximum of 8 process data words
(16 bits/word) per direction.
– Process data are not saved in the controller.
– Process data are for instance setpoints, actual values, control words, and status
words.
 Parameter data are transmitted via the acyclic channel.
– In general, the parameter data transfer is not time-critical.
– The access to the parameter data depends on the PROFIdrive profile.
– Examples of parameter data are operating parameters, motor data, and diagnostic
information.
– The acyclic channel provides access to all Lenze codes.
– Parameter changes must be stored via code C00002 of the Inverter Drive 8400
motec.
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Note!
Please observe the direction of the flow of information!
• Process input data (Rx data):
– Process data from the controller (I/O device) to the I/O controller
• Process output data (Tx data):
– Process data from the I/O controller to the controller (I/O device)