Owner's Manual

Owner’s Manual for Power Zone Connectivity Server 39
Installation and Operation
Local Trending
Local Trending can be used to collect data at timed
intervals as small as 0.1 ms. The data cannot be graphed
until the data collection has stopped. The total amount of
collected data cannot exceed 8,192 bytes. If trending 16
Bit data, the maximum number of points is 4,096. If
trending 32 Bit data, the maximum number of data points
is 2,048. The maximum number of data frames trended is
the maximum number of data points divided by the
number of parameters. For example, 16 bit trending of 6
parameters results in a maximum of (4,096 / 6), or 682
frames.
See Figure 3-91. To configure and use local trending:
1. Select the data values to collect.
2. To add a data point, click the plus sign (A).
3. Select the data type using the Type drop down list
(B). There are two types of data that can be
collected: high speed data, which can be collected
at intervals as short as 0.1 milliseconds, and
function code data which are updated every two
milliseconds.
4. Select the data value from the Reference drop
down list (C).
5. Select the time interval between data points using
the Time between frames drop down lists (D).
• If a time interval of less than two milliseconds is
selected and the data values include some data
values that are function code types, data will be
collected at your specified time interval but the data
values that are function code types will only
change every two milliseconds. High speed data
consists of AC voltages/currents and a 100 us time
stamp. Function code data consists of Analog I/O
and Digital I/O values.
6. A trigger value (optional) is used to stop data
collection when a specific condition is observed.
To configure a trigger value select the data value
that will cause the trigger, the comparison
operation to use, and the level that will cause the
trigger to occur (E).
7. Use the Post Trigger Frames dropdown list (F) to
specify the number of data points that should be
collected after the trigger occurs.
8. Use the Trending data size radio buttons (G) to
select the number of bits to use for each data value
(16 Bit or 32 Bit).
9. Select the Set Configuration button (H) to save the
configuration to the Main Controller.
10. Select the Reset Trending button (I) to start
collecting data using the new configuration or to
restart data collection after it has stopped due to a
trigger occurrence.
11. Select the Force Trigger button (J) to stop data
collection after the post trigger data points have
been collected.
12. Select the Stop Trending button (K) to stop data
collection immediately without waiting to collect the
post trigger data points.
13. Select the View Graph button (L) to display the
selected data in a graph.
14. Select the Download button (M) to download the
collected data in a Comma Separated Value (csv)
file.
Figure 3-91. Local Trending Screen
In the example above, two data values are being
collected and stored as 16 bit values: Generator Voltage
A to B and utility voltage A to B (Figure 3-92). Data
points are collected every 0.1 milliseconds.
Data collection is configured to stop when Generator
Voltage A to B exceeds 2,500 (250V because the RMS
voltages are multiplied by 10). Once the trigger value
occurs, ten additional frames (data samples) will be
collected.
The results of this configuration are that 2,048 total data
frames will be collected, each frame containing two
values of 16 bits each. Ten of those data frames will be
collected after the trigger, and 2,038 frames will be
collected prior to the trigger.
009617
A
C
B
F
G
H
I
J
K
L
M
D
E