Halytech
hydroSpider2 User’s Manual v1.23
Page 107
To limit the amount of data reported to the server, DNP3 events can be generated only when the
logged value of an input channel changes. By sending changes in the logged data as a sequence of
events, the DNP3 master can reconstruct the complete history of each input channel (or "point").
This process is the DNP3 equivalent of sending periodic automatic reports via email or FTP, and can
be used instead of or in conjunction with automatic reports.
The following options are available:
Enable Unsolicited
: Whether to send unsolicited responses to the server.
Report all logged data
: If cleared, only changes in input values will be reported as DNP3
events, and the hydrospider2 will only attempt to connect to the DNP3 server when it has
some changed data to report.
Period
: How often to report events by sending unsolicited responses.
Choose from options between 1 minute and 1 day, or "Off" to disable periodic reporting
Fast Period
: How often to report events while an alarm with “Repeat (fast period)” enabled
is active (see DNP3 alarms)
Offset
: Choose a delay to add to the event sending time.
This is mainly useful in three situations:
o
When you want to send events daily at a time other than midnight. E.g.: to send
events at 6:30am, set the offset to 6 hours and 30 minutes.
o
If you also send automatic reports, you may wish to send DNP3 events at a different
time to the report, to ensure that the report is not delayed while the unsolicited
responses are sent.
o
When you want to include data that is logged slightly after events are usually sent
out. E.g.: SDI-12 channels take between 0.1s and 1s to respond. This means they
won't be included as events if they are sent exactly on the hour. Adding an offset of
10 seconds will ensure these late-running sensors are included.
Note
: if you're using the modem to actively connect to the server ("Listen" is disabled), you must not
disable unsolicited responses. The modem only tries to connect when there is data to send, and if
unsolicited responses are disabled, there will never be any DNP3 data to send, so the connection
with the server will never be established.
