Data transfer
Communication channels
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Lenze · Decentralised frequency inverter 8400 motec (EtherNet/IP™ option) · EDS84DMOTEIP EN 3.0 - 02/2019
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7.1 Communication channels
EtherNet/IP transmits parameter data and I/O data between the host system (scanner) and the
inverters (adapters) connected to the fieldbus. The data are transmitted via corresponding
communication channels depending on their time-critical behaviour.
The I/O data channel transmits I/O data by means of "implicit messages".
• The inverter is controlled by means of the I/O data.
• The transmission of I/O data is time-critical.
• I/O data are transmitted cyclically between the host system (scanner) and the inverters
(adapters) (permanent exchange of current input and output data).
• The host system (scanner) has direct access to the I/O data (the data are, for example, stored
directly in the I/O area).
• To the scanner, up to 10 data words (max. 20 bytes) can be sent.
• From the scanner, up to 8 data words (max. 16 bytes) can be sent.
• I/O data are not stored in the inverter.
• I/O data are e.g. setpoints, actual values, control and status words
The parameter data channel transmits parameter data by means of "explicit messages".
• The transmission of parameter data is usually not time-critical.
• Examples of parameter data are operating parameters, motor data, and diagnostic information.
• The parameter data channel provides access to all Lenze codes.
• Parameter changes must be saved via code C00002 of the Inverter Drive 8400 motec.
Note!
The terms "input" and "output" refer to the point of view of the scanner:
• Input data is produced by the adapter and consumed by the scanner.
• Output data is produced by the scanner and consumed by the adapter.
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