História stránky

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Note 2: The protocol supports sending long time stamps (CP56Time2a tag) in local time or UTC time with defined offset (see the parameter Use monotonic UTC time +).

The Browse button opens a browsing dialog for the station address. If the communication is functional, a dialog with the ASDU addresses received so far is displayed. The Refresh button can be used to clear the list of received ASDU addresses.

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Station protocol parameters

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• I/O tag address is mapped on Information object address, i.e. it has 3 bytes and must within the range of 0..16777215.
• Input tags must be particular types (Ai, Ci, Di, Qi) for received ASDU, see the table 1.
• For particular type of output tag (Ao, Dout, Co) it is necessary to set an ASDU type, that has to be used, see the table 2 and also the table 1 in the balanced mode.
• Archive for providing old values: if client requires archive values using ASDU 250, the server sends:
  1. values of archived I/O tag, which are defined in this entry field
  2. if the entry field is not defined, values of archived I/O tag, that are directly archived by the I/O tag
  3. if the archived I/O tag does not exist, values of the I/O tag, that is archived by the control object of the I/O tag
  4. if the object doesn't exist (or the archive is not available), the server returns an error.
  Definition of an I/O tag allows e.g. to set sending 10-minute averages instead of sending all changes of the I/O tag.

Browse

For the I/O tags, it is possible to discover the list of objects, as long as the KOM process is running and communication with a station is established.
Clicking the Browse button opens the IEC870-TCPSRV Item Browser window and displays a list of objects that have been read so far. The object list is created dynamically as a result of received messages.

The list of objects is dynamic, i.e. when a new value arrives in the KOM process, it is updated. Filtering in individual columns is also supported, asterisks can be used in the mask (e.g. *Short*).

Double-clicking on a particular line will cause the Address parameter to be inserted into the configuration of I/O tag from which the IEC870-TCPSRV Item Browser window was opened.

The Refresh button clears the list of values in both the CNF and the KOM process.

The Value column contains the received value.

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Kotva
tell_cmd tell_cmd

Tell commands

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