DNP3 object points

Location3 is the DNP address of the device. Every DNP device is assigned an address. The address of the DNP device must be positive in value. This Location3 value must match a device address from the Device Configuration XML file.

Note: Set location3 to the negative DNP address of the device to log the value received from the RTU to the message log. Set the DNP address back to the positive DNP address to remove logging.

Example: For an RTU with address 4, set location3=-4 to log the value received from the RTU to the message log.

Polled values received from the DNP device that have associated PI points will have the value either sent to the PI or discarded. A value is discarded if the value is received for a scanclass that the point does not belong. All integrity scans, event scans, and unsolicited messages received from the DNP device will be sent to the corresponding PI point regardless of the point assigned scanclass.

Heartbeat Points

• Location3 is set to the DNP address of the device.

• Location3 is set to 0 for the interface heartbeat point (non-UniInt health point).

• Location5 must be set to equal to 0 for all heartbeat points.

Reset Link Counter Point

• Location3 is set to the DNP address of the device.

Counter Freeze Request Point

• Location3 is set to the DNP address of the device.

• Location4 (scan class)

• The scan class determines the frequency at which input points are scanned for new values. Set Location4 to 0 for event-based (trigger) points, unsolicited inputs, and output points. For auditing changes to points, set Location4 to -1 to record the short-form version of point attribute changes or -2 to record the long-form version.