Lenze E84DGFCRFNP - 7 Data Transfer; Communication Channels

Lenze · Inverter Drive 8400 motec (PROFINET® option) · DMS 5.0 EN · 02/2019 · TD23 37
7 Data transfer
7.1 Communication channels
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
7 Data transfer
PROFINET transmits parameter data, configuration data, diagnostic data, alarm messages, and
process data between the host (I/O controller) and the inverters that are part of the fieldbus (I/O
devices). Depending on their time-critical behaviour, the data are transmitted via corresponding
communication channels.
7.1 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 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 inverter.
• Process data are e.g. setpoints, actual values, control words, 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 changes must be stored via code C00002 of the Inverter Drive 8400 motec.
 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)