Notes

The RT statistics displays are not supported under TwinCAT for an EL66xx-RT device.
Solution: As an alternative, corresponding CoE parameters can be read for diagnostic purposes.
The publisher features of "OnChangeOnly" and "DataExchange (divider/modulo)" are not supported together with the EL66xx.
Solution: [from FW08] Transmitting the configured publisher variables can be cyclically suppressed by DevCtrl.
If a publisher is set up on an EL66xx, the publisher's CycleIndex must be taken care of by the user. On a PC, on the other hand, they are incremented by TwinCAT.
The following is recommended for diagnosis of a network variable connection:
1. Monitor the link status in the "DevState" of the RT device (Device --> Inputs --> DevState). The expected state is DevState = 0.
2. Monitor the Quality and CycleIndex in the subscriber.
The link LED in the EL66xx only indicates the status of the cable connection, not that of any network variable connection that may exist.
If the EL66xx is used exclusively to transfer network variables, ConnectToTcpStack should be deactivated.
A maximum of 32 for each, publishers and subscriber, are permitted per EL66xx.