User Guide

Chapter 10 - Create/Edit
Trend Application
76
Siemens Industry, Inc.
BACnet Field Panel Web Server User Guide
125-3584
2017-07-31
● The Start Date/Time fields allow you to specify a date/time value for a trend to
begin (if the enable check box is checked). These fields can be edited in existing
Trend Objects.
● The
End Date/Time fields allow you to specify a date/time value for a trend to end
(if the enable check box is checked). These fields can be edited in existing Trend
Objects.
● The Stop when full check box allows you to define whether trending will stop when
the trend log is full. Otherwise, new trend records will rollover old trend records.
This check box defaults to unchecked (NO).
● The
Max Samples field allows you to define the trend buffer size. If you do not
specify a minimum value, the default value is 5. The maximum value is 2500; the
circular buffer will drop off data points after the maximum value is reached.
● The Notification Threshold field allows you to define the notification threshold for
filling the trend buffer. This field defaults to 80% of maximum samples.
● The
Notification Class drop-down allows you to select the notification class desired
for sending alarm notification. This option can be edited in existing Trend Objects.
This field defaults to Notification 0 or the first Notification Class.
● The FTP Upload Enabled check box allows you to enable FTP upload of data
collected for a Trend Object.
● The
FTP Upload Status field displays Success/Failed/Unknown status to indicate
the result of past attempts to upload trend data to the FTP Server. If the last try
was successful, the displayed time indicates when data was last uploaded. If the
last try failed, the displayed time indicates when the failure was first detected. The
status Unknown indicates that no attempt has yet been made to upload to the FTP
Server. Note that the
FTP Upload Status field is not automatically updated on the
UI upon each try, but is retrieved from the field panel whenever the trend object is
selected.
For more information on trending, see the
APOGEE BACnet ALN Field Panel User's
Manual
(125-3020).
Off-Node Trending
On-node trending is when the trended object resides in the same panel as the trend
log object.
Off-node trending is when the trended object is located in a different device than the
trend log object.
For more information about on- and off-node trending, see the
APOGEE BACnet ALN
Field Panel User's Manual
(125-3020).
Depending on where the object is located, the
Point To Be Trended field in the Trend
Editor will display either the object name or the BACnet Encoded Name alias.
The
Point To Be Trended field will display the object name when one of the following
occurs:
● The point to be trended resides in the local panel and is resolved at the time of
creation.
● The point to be trended resides in a local MS/TP device located on the panel’s
physical MS/TP network and is resolved at the time of creation.
If these conditions are not fulfilled at the time of creation, the point to be trended will
display the BACnet Encoded Name alias in the
Point To Be Trended field.
Ensure that the panel containing the point to be trended is refreshed prior to opening
a trend graph and attempting to make it dynamic.