ABB DSTA-121A57120001 Win win DCS system ABB control module

Description

• DNP POINT MAPPING: DSTA-121A57120001 When enabled, the 120 User Map Values are included in the

  DNP Object 30 point list. For additional information, refer to GE Multilin publication

  number GEK-106636A: 745 Communications Guide.

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  TRANSMISSION DELAY: DSTA-121A57120001 Select the minimum time from when a DNP request is received

  and a response issued. A value of zero causes the response to be issued as quickly as

  possible.

  DATA LINK CONFIRM MODE: Select the data link confirmation mode for responses

  sent by the 745. When “Sometimes” is selected, data link confirmation is only

  requested when the response contains more than one frame.

  DATA LINK CONFIRM TIMEOUT: Selects a desired timeout. If no confirmation response

  is received within this time, the 745 will re-send the frame if retries are still available.

  DATA LINK CONFIRM RETRIES: Select the maximum number of retries that will be

  issued for a given data link frame.

  SELECT/OPERATE ARM TIMEOUT: Select the duration of the select / operate arm timer.

  WRITE TIME INTERVAL: Select the time that must elapse before the 745 will set the

  ‘need time’ internal indication (IIN). After the time is DSTA-121A57120001 written by a DNP master, the IIN

  will be set again after this time elapses. A value of zero disables this feature.

  COLD RESTART INHIBIT: When disabled, a cold restart request from a DNP master will

  cause the 745 to be reset. Enabling this setpoint will cause the cold restart request to

  initialize only the DNP sub-module.

  When “Disabled” is selected, a cold restart request will cause loss of protection until

  the 745 reset completes.

• The reset function performs the following actions: all latched relays are set to the non

  operated state and latched target messages are cleared, if the initiating conditions are no

  longer present. Resetting can be performed in any DSTA-121A57120001 of the following ways: via RESET on the

  front panel while the 745 is in local mode (i.e. the Local LED indicator is on); via a logic input;

  via any of the communication ports.

  LOCAL RESET BLOCK: The 745 is defaulted to the local mode. As a result, the front

  panel (local) RESET key is normally operational. Select any logic input, virtual input,

  output relay, or virtual output which, when asserted or operated, will block local mode,

  and hence the operation of the front panel RESET.

  REMOTE RESET SIGNAL: Select any logic input which, when asserted, will (remotely)

  cause a reset command.

• A supercap-backed internal clock runs even when control power is lost. With control

  power off, the clock continues to run for 45 days. The clock is accurate to within 1 minute

  per month. An IRIG-B signal may be connected to the 745 to synchronize the clock to a

  known time base and to other relays. The clock performs time and date stamping for

  various relay features, such as event and last trip data recording. Without an IRIG-B signal,

  the current time and date must be entered in a new relay for any time and date displayed.

  If not entered, all message references to time or date will display “Unavailable”. With an

  IRIG-B signal, only the current year needs to be entered.

  DATE: Enter the current date, using two digits for the month, two digits for the day,

  and four digits for the year. For example, April 30, 1996 would be entered as “04 30

  1996”. If entered from the front panel, the new date will take effect at the moment of

  pressing the ENTER key.

  TIME: Enter the current time by using two digits for the hour in 24 hour time, two digits

  for the minutes, and two digits for the seconds. DSTA-121A57120001 The new time takes effect at the

  moment of pressing the ENTER key. For example, 3:05 PM is entered as “15 05 00”, with

  the ENTER key pressed at exactly 3:05 PM.

  IRIG-B SIGNAL TYPE: Select the type of IRIG-B signal being used for clock

  synchronization. Select “None” if no IRIG-B signal is to be used.

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