ProSoft Technology 5201-DFNT-104S - Manual (Page 75)

IEC-60870-5-104 (104S) Protocol Implementation 104S v2 ♦ ProLinx Gateway
Protocol Manual (Firmware v2.xx)
ProSoft Technology, Inc.
Page 75 of 157
When closing the connection, the gateway can be configured to clear all the
messages in its queue. The following parameter is used to implement this task:
The configuration above would cause to gateway to delete all pending
messages/events while closing the connection to the client.
3.6 Events
In order to improve communication efficiency, most applications will require the
client to periodically poll for data changes with a higher priority than polling for
other monitored data. Every time a data point changes, the server can send this
information as an event, typically with date and time information indicating when
the change occurred.
The gateway supports a buffer queue of 99 events per data type. When the
queue is full, the gateway will delete the oldest event in the queue, replacing it
with the newest event received for that data type.
March 19, 2010