Beckhoff EPP3504-0023 Short Manual page 180

Commissioning on EtherCAT Master
Fig. 145: Configuring the process data
Manual modification of the process data
According to the ESI description, a PDO can be identified as "fixed" with the flag "F" in the PDO
overview (Fig. Configuring the process data, J). The configuration of such PDOs cannot be
changed, even if TwinCAT offers the associated dialog ("Edit"). In particular, CoE content cannot be
displayed as cyclic process data. This generally also applies in cases where a device supports
download of the PDO configuration, "G". In case of incorrect configuration the EtherCAT slave
usually refuses to start and change to OP state. The System Manager displays an "invalid SM cfg"
logger message: This error message ("invalid SM IN cfg" or "invalid SM OUT cfg") also indicates the
reason for the failed start.
A detailed description [} 185] can be found at the end of this section.
"Startup" tab
The Startup tab is displayed if the EtherCAT slave has a mailbox and supports the CANopen over EtherCAT
(CoE) or Servo drive over EtherCAT protocol. This tab indicates which download requests are sent to the
mailbox during startup. It is also possible to add new mailbox requests to the list display. The download
requests are sent to the slave in the same order as they are shown in the list.
180 Version: 1.2 EPP3504-0023