Lenze EtherCAT Controller-based Automation - Manual (Page 31)

Lenze · Controller-based Automation · EtherCAT® Communication Manual · DMS 6.4 EN · 04/2014 · TD17
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4 The Lenze automation system with EtherCAT
4.4 Interaction of the components
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Explanation of the transitions during system start
While a state is passed through, different tests are carried out (e.g. it is tested whether the physical
topology complies with the configuration). If the tests are successful, the system automatically
changes to the next state.
If the tests are not successful, the fieldbus changes to the next state. Corresponding remedial
measures are described in the chapter " Error scenarios " ( 174) .
State What happens? What is tested?
PLC EtherCAT
Origin Unknown The system starts. EtherCAT configuration available?
Origin Init EtherCAT is initialised (a fieldbus
scan is carried out).
Does the EtherCAT configuration
match the results of the fieldbus
scan?
Stop Pre-operational • EtherCAT is active.
• SDO communication is possible.
Running Safe-operational • The PLC program is being loaded.
• The PLC is running.
• The input data in the process
image are updated.
• The output data from the process
image are not transferred to the
slaves.
Running Operational The system is running.