Lenze 8400 motec - 8 Process Data Transfer

Process data transfer
38 Lenze · Decentralised frequency inverter 8400 motec (AS-Interface option) · EDS84DMOTASI EN 4.0 - 09/2013
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8 Process data transfer
• Process data are transmitted via the process data channel.
• The process data serve to control the inverter.
• The transmission of process data is time-critical.
• Process data are cyclically transferred between the master and the slaves participating in the
fieldbus (continuous exchange of current input and output data).
• The master can directly access the process data. In the PLC, for instance, the data are directly
assigned to the I/O area.
• Process data are not saved in the inverter.
• Process data are e.g. setpoints, actual values, control words, and status words.
 Note!
Observe the direction of the information flow.
• Process input data (Rx data):
Process data from the inverter (slave) to the host (master)
• Process output data (Tx data):
Process data from the host (master) to the inverter (slave)