Configure the SCADAPack x70 Device's Alarm Limits Settings

The SCADAPack x70 tab on the Forms of SCADAPack x70 Analog Configuration items contains an Alarm Limits section. Use the section to specify the analog's alarm limit values, by entering the relevant engineering (floating point) value for each limit. Also use the section to specify whether the SCADAPack x70 device is to generate, store and report events and/or alerts (alarms) for the item whenever the point's value reaches or transgresses an Alarm Limit threshold. The ability to generate alerts only applies when using a communications protocol that supports, and is configured to enable, event generation.

(You use the separate Scaling section of the tab to define how the SCADAPack x70 device scales the analog's raw (integer) values into engineering (floating point) values (see Specify the SCADAPack x70 Device's Point Scaling).)

The section contains the following properties:

• 1 High to 4 High—Use to specify the value of each High Limit.

  If configured and enabled to do so, the SCADAPack x70 device will trigger an alert (alarm) whenever the analog's value reaches, or rises above, the Limit value. It will only do so if the corresponding RTU Event is set to an option other than 'Disabled'.

  Regardless of whether the SCADAPack x70 device generates an alert, if this Analog Configuration item is associated with a protocol-specific SCADAPack x70 Analog Point, that point will inherit the analog's Limit values. You use the Point's configuration Form to define how Geo SCADA Expert responds when the analog's value reaches, or rises above, a Limit value (see the relevant Analog Point configuration section in this guide).

• 1 Low to 4 Low—Use to specify the value of each Low Limit.

  If configured and enabled to do so, the SCADAPack x70 device will trigger an alert (alarm) whenever the analog's value reaches, or falls below, the Limit value. It will only do so if the corresponding RTU Event is set to an option other than 'Disabled'.

  Regardless of whether the SCADAPack x70 device generates an alert, if this Analog Configuration item is associated with a protocol-specific SCADAPack x70 Analog Point, that point will inherit the analog's Limit values. You use the Point's configuration Form to define how Geo SCADA Expert responds when the analog's value reaches, or falls below, a Limit value (see the relevant Analog Point configuration section in this guide).

• RTU Event—Use to specify whether the SCADAPack x70 device is to generate an alert event when the above Limits are reached or transgressed. The options are:
  • Disabled—The SCADAPack x70 device does not generate an event if the analog's value reaches or transgresses the limit.
  • Enabled—The SCADAPack x70 device generates an event if the analog's value reaches or transgresses the limit. The device stores the event in its internal Event Buffer. The device's internal clock applies a time stamp to the event to indicate the time that it was generated.

    The SCADAPack x70 device will buffer the events until Geo SCADA Expert polls the device for such data. The exception to this is if the DNP3 protocol is being used for communications with the SCADAPack x70 device and that device is configured to send unsolicited messages for that particular class. If so, once a sufficient number of events have been stored in the Event Buffer, the SCADAPack x70 device will attempt to send the unsolicited message to Geo SCADA Expert. The unsolicited message will contain the events that are stored in the Event Buffer.

  • Enabled Unsolicited—The SCADAPack x70 device generates an event if the analog's value reaches or transgresses the limit. In addition, the device attempts to send the event in an unsolicited message to Geo SCADA Expert. The unsolicited message is generated regardless of the number of events in the device's internal Event Buffer. As with the 'Enabled' option, the device's internal clock applies a time stamp to the event to indicate the time that it was generated.

    The unsolicited message might be sent immediately, or might be delayed according to the unsolicited message generation settings of the device.