Lenze E94AYCER - Manual (Page 52)

7 Data transfer
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Lenze · E94AYCER communication module (PROFINET®) · Communication Manual · DMS 9.0 EN · 12/2013 · TD17
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7 Data transfer
PROFINET transmits parameter data, configuration data, diagnostic data, alarm messages, and
process data between the host (IO controller) and the inverters that are part of the fieldbus (IO
devices). Depending on their time-critical behaviour, the data are transmitted via corresponding
communication channels.
Communication channels
The process data channel transmits process data.
• The process data serve to control the inverter.
• The transmission of process data is time-critical.
• Process data are transmitted cyclically between the IO controller and the IO devices that are part
of the fieldbus according to the Provider/Consumer model (continuous exchange of current
input and output data).
• The IO controller can directly access the process data. In the PLC, for instance, the data are
directly assigned to the IO area.
• Up to 32 process data words (64 bytes) per direction can be exchanged.
• Process data are not saved in the inverter.
• Process data are e.g. setpoints, actual values, control and status words.
Parameter data are transmitted via the acyclic channel.
• The transmission of parameter data is usually 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 data changes must be saved via code C00002 of the Servo Drives 9400.
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Note!
Please observe the direction of the flow of information!
Process input data (Rx data):
• Process data from the inverter (IO device) to the IO controller
Process output data (Tx data):
• Process data from the IO controller to the inverter (IO device)