S&C TripSaver II - Configuring Trip Operations

60 S&C Instruction Sheet 461-509
Unsolicited Response
The DNP3 unsolicited response capability allows the communications gateway to report
event data to the SCADA master in real time without waiting for a request from the
master. See Figure 58.
Figure 58. The Unsolicited Response panel.
The fields are defined as follows:
• Indenite Unsolicited Retries. This toggle button enables the communications
gateway to keep retrying the transmittal of cached TripSaverII recloser unsolicited
responses until successful back to the SCADA master.
• Number of Retries for Conrm. This eld is only relevant when the Unsolicited
Responses Retried Indenitely function is disabled. In this case, the eld denes
the maximum number of transmittal retries for an unsolicited response messages
back to the SCADA master(s).
• Delay Before Retry. This represents the delay before the rst retry of a queued
TripSaver II recloser unsolicited response. Subsequent retries will be sent after
increasing amounts of delay to minimize network congestion in case of an extended
SCADA master outage.
• Unsolicited Transmit Delay Event Count. This is the maximum number of DNP3
unsolicited events the gateway will queue before sending to the SCADA master. A
value of one (1) disables the queuing mechanism so the gateway will immediately
send all unsolicited events.
Conguring the Communications Gateway