The connection table on the AN-X-DCSNet interface node shows the status of each device. Error counters provide additional information for diagnosis and troubleshooting.

Error counters

There are 6 global error counters:

Messages with invalid length

This error counter will increment each time an UDP message is received with a size that is either smaller than 8 bytes or larger than 1408 bytes.

Messages from unknown source

ibaPDA gives the driver a list of expected UDP connections when a new configuration is written to the AN-X-DCSNet device. This error counter will increment each time an UDP message is received from a source address that is not known by the driver.

Messages with unknown length or ID

This error counter will increment each time an UDP message is received from a known source address but with an unexpected configuration ID or unexpected length. See the protocol information paragraph for more information.

Non-multicast messages

This error counter will increment each time an UDP message is received that is not sent to a multicast address.

Multicast list is full

The driver can join a maximum of 40 multicast groups. If the driver is asked to join more than 40 groups then this error counter is incremented. You can solve this situation by just starting the acquisition. If that doesn’t work then try reloading the driver. You can reload the driver by setting the Force reload of driver checkbox on the General tab in the I/O Manager.

Leave multicast errors

This error counter will increment each time an error occurs when the driver tries to leave a multicast group.
Connection table

The table shows the status of the 40 possible connections (maximum 4 devices and 10 connections per device). An active connection is colored green.

The columns contain the following information:

  • Source IP address

  • Destination IP address (multicast!)

  • Configuration ID

  • Receive message counter

  • Join multicast error counter

    The driver attempts to join the multicast group on every available network interface of the ibaPDA server PC. If any of these interfaces is not connected, the error counter increases. This is not relevant as long as the disconnected interface is not the one used to communicate with the AN‑X‑DCSNet device.

  • Received message length

    Total length of the received message so it includes the 8 byte header.