SEW-Eurodrive DFE24B EtherCAT - Acyclic Data Exchange Via Ethercat; Configuration of the Ethercat Communication Option; Monitoring Functions; Diagnostics

10
Manual – Fieldbus Interface DFE24B EtherCAT®
3
Characteristics
Introduction
3.2.4 Acyclic data exchange via EtherCAT
®
Acyclic READ/WRITE services are introduced in line with the EtherCAT
®
specification.
They are transmitted during normal cyclical operation along with the messages without
affecting the performance of the process data communication via EtherCAT
®
.
Read and write access to the drive parameters is made possible via SDO (Service Data
Objects), which are implemented according to CoE (CAN application protocol over
EtherCAT
®
) or VoE services (Vendor-specific over EtherCAT
®
).
This parameter data exchange enables you to implement applications in which all the
important drive parameters are stored in the higher-level programmable controller, so
that there is no need to make parameter settings manually on the drive inverter itself.
3.2.5 Configuration of the EtherCAT
®
communication option
The EtherCAT
®
communication option is designed so that all fieldbus-specific settings
are made during startup of the EtherCAT
®
system. This means the frequency inverter
can be integrated into the EtherCAT
®
environment and switched on quickly.
3.2.6 Monitoring functions
Using a fieldbus system requires additional monitoring functions for the drive technol-
ogy, for example, time monitoring of the fieldbus (fieldbus timeout) or rapid stop con-
cepts. You can, for example, adapt the monitoring functions of MOVIDRIVE
®
B/
MOVITRAC
®
B specifically to your application. You can determine, for instance, which
of the drive inverter's error responses should be triggered in the event of a bus error. For
many applications, a rapid stop would be the preferred response, but you can also set
other error responses. As the functions of the control terminals are still active in fieldbus
operation, you can still implement fieldbus-independent emergency stop concepts via
the drive inverter terminals.
3.2.7 Diagnostics
MOVIDRIVE
®
B and MOVITRAC
®
B provide numerous diagnostics options for startup
and service. For example, you can use the integrated fieldbus monitor to control both
setpoint values sent from the higher-level controller as well as the actual values.