Specify how the Driver Determines whether a Reported Value is Out of Range
The Alarm Limits section of the Analog Point tab includes an Out of Range combo box. Use the Out of Range Check combo box to specify how the driver determines whether the point value reported by the SCADAPack x70 device is ‘out of range’.
Choose from:
- Both—The driver deems the point value to be out of range if it either:
- Receives notification from the SCADAPack x70 device that the point value is overrange (by receiving a DNP3 overrange status flag)
- Or:
- Determines that the point value is outside of the point’s Overrange to Underrange limits. Both limits appear in the Alarm Limits section of the Analog Point tab (see Alarm Limits). (The values that are assigned to the limits are inherited from the SCADAPack x70 Analog Configuration item with which the point is associated (see Configure the Out Of Range Limits).)
- Master Only—The driver deems the point value to be out of range if the value is higher than the Overrange limit, or lower than the Underrange limit.
- The driver ignores any DNP3 overrange status flags that might be reported by the SCADAPack x70 device.
- From Status Flags—The driver deems the point value to be out of range if the SCADAPack x70 device sends a DNP3 overrange status flag with the point value.
- The driver does not perform any further checking to determine whether a point value is out of range should it not receive a DNP3 overrange status flag.
If the driver deems the point value to be ‘out of range’ it processes the value as per the Engineering Units Exceeded setting (see Define how Over Range and Under Range Values are Processed in the Geo SCADA Expert Guide to Core Point Configuration).