Operationally Related Interruption Of The Ethercat Communication - Leuze electronic DDLS 538 S2 Series Original Operating Instructions

EtherCAT
No EtherCAT slave participant between the data transmission paths
The calculated minimum cycle times of the given used control are doubled (see chapter 7.4.1 "Calculation
of the control cycle time").
E therC A T
1 2
1 Master
2 Bus terminals
Fig. 7.7: Cascading without slave participant between the data transmission paths
7.4.3

Operationally related interruption of the EtherCAT communication

Especially during commissioning or maintenance work, the following operationally related interruptions may
occur in the EtherCAT network.
• The supply voltage of the master-side and/or slave-side DDLS 538 ... S2 ... is switched off.
• The EtherCAT link of the immediately downstream participant of the DDLS 538 ... S2 ... installed on
the slave side is interrupted.
• The optical link between the data transmission devices is interrupted.
In these cases, the DDLS 538 ... S2 ... installed on the master side switches off its own copper link to sig-
nal to the preceding EtherCAT participant that a network connection has been interrupted.
NOTICE
Signaling of network interruption by the DDLS 538 ... S2 ... installed on the master side can be
delayed by up to 5 ms.
• If the minimum permitted control cycle time is maintained, the preceding EtherCAT participant detects
the interrupted network topology.
EtherCAT registers the participants that are not to be addressed and issues an error message.
• EtherCAT slaves that are installed before the data transmission path are addressable as before.
• The EtherCAT master remains in the Operational operating state.
After rectifying the network interruption, the DDLS 538 ... S2 ... is immediately ready for EtherCAT data
transmission.
• TwinCAT cyclically attempts to initialize the separated EtherCAT participants.
• After rectifying the network interruption, the EtherCAT participants that are installed downstream of the
data transmission path are again addressable.
Leuze electronic GmbH + Co. KG
D D LS 538
D D LS 538
F requency F4 F requency F3
D D LS 538
D D LS 538
F requency F requency F3
F4
D D LS 538
D D LS 538
F requency F4 F requency F3
DDLS 538 ... S2 ...
S lave
D D LS 538
D D LS 538
F requency F4 F requency F3
D D LS 538
D D LS 538
F requency
F requency F4 F3
S lave
S lave
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