Showing results 1 to 7 of 7

Thread: Alarm Timestamp

  1. #1
    Join Date
    15.04.2013
    Posts
    7

    Default Alarm Timestamp

    Hi,

    I want to know what is the source for the time stamp is displayed in the alarm message list for the "time received" column. Is it the system time?

    TIA

  2. #2

    Default Re: Alarm Timestamp

    Hi Kavya,

    That depends. For drivers that do not support external timestamping from the device or PLC, it is the system time when the alarm was created.

    For drivers that do support external timestamping, it can be the system time, but it can also be the external time that was included with the value from the device or PLC.

    You can add the column "variable status" in the alarm list to see if the alarm uses an external timestamp.

    In some cases even when a timestamp was included, it can still be the system time. E.g. for the DNP3_NG driver when the received time is 0 (01.01.1970) or for the IEC850 driver when the time quality indicates that the device time is not valid.

    Sorry, for the long answer, there is just not a simple "yes" or "no"

    Best regards,
    Mark

  3. #3
    Join Date
    30.05.2007
    Location
    Salzburg
    Posts
    879

    Default AW: Alarm Timestamp

    Please check out following chapter in the manual:
    Manual -> Runtime -> Handling of date and time

    If you have variables basing on a real-time capable driver (i.e. IEC870) then the timestamp is taken from the PLC (PLC sends value + timestamp) - external time stamping.

    regards,
    herbert


  4. #4
    Join Date
    30.05.2007
    Location
    Salzburg
    Posts
    879

    Default AW: Alarm Timestamp

    .... that was more or less synchronous double posting


  5. #5

    Default Re: Alarm Timestamp

    now let's hope that this answers the question

  6. #6
    Join Date
    15.04.2013
    Posts
    7

    Default Re: Alarm Timestamp

    Hi mark,

    I am using DNP3 driver.I added variable status to the AML. The status is "SPONT-T_INTERN-T_STD". I am still unable to find out whether time stamp is external or PC time.

  7. #7
    Join Date
    30.05.2007
    Location
    Salzburg
    Posts
    879

    Default AW: Alarm Timestamp

    well ... you have your answer with the status "SPONT-T_INTERN-T_STD

    Manual -> Status processing -> Status bits

    Bit number: 22
    Short term: T_INTERN
    Long name: Real time internal


Similar Threads

  1. IEC 60870 timestamp in zenon
    By abstinent in forum Drivers
    Replies: 8
    Last Post: 17th February 2013, 08:51
  2. Problems with alarm list and alarm time
    By dario in forum zenon Supervisor
    Replies: 4
    Last Post: 9th November 2012, 13:52
  3. Alarm Status Line and Alarm List
    By tomaslipa in forum zenon Supervisor
    Replies: 1
    Last Post: 21st January 2009, 12:02

Posting Rules

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •