Lenze E84AYCIB - Manual (Page 40)

E84AYCIB communication manual (INTERBUS)
Data transfer
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EDS84AYCIB EN 4.0 - 11/2010
7 Data transfer
The INTERBUS master and controller communicate with each other by exchanging data
telegrams via INTERBUS. The user data area of the data telegram contains parameter data
or process data. In the controller, the parameter data and process data are assigned to
different communication channels.
Communication channels
 The process data channel transmits process data.
– The process data are used to actuate the controller.
– The host (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 controller.
– Process data are transmitted cyclically between the host and the controllers
(permanent exchange of current input and output data).
– Process data for instance are setpoints, actual values, control words, and status
words.
– In the case of Inverter Drives 8400 a maximum of 16 process data words (16 bits/
word) can be exchanged for each direction.
 The parameter data channel transmits parameter data.
– The parameter data channel provides access to all Lenze codes.
– The transmission of parameter data usually is not time-critical.
– Parameter data for instance are operating parameters, motor data, and diagnostics
information.
– The parameter changes must be stored via code C00002 of the Inverter Drive 8400.
– The parameter data channel assigns up to 4 words of the input and output data
words in the master and is structured identically for both transmission directions.
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Note!
Observe the direction of the flow of information!
• Process input data (Rx data):
– Process data from the controller (slave) to the master
• Process output data (Tx data):
– Process data from the master to the controller (slave)