GE Industrial Solutions POWER LEADER ModBus Monitor - Manual (Page 37)

POWER LEADER Modbus Monitor
Chapter 4 – Operation
31
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Figure 39. Monitor Devices list.
The devices in the selected group are listed. If the group
contains more devices than will fit on one screen, the
Page Down button becomes active, and you may scroll
through multiple pages of device listings within the
currently selected group.
At the bottom of the screen is a summary of the currently
selected device’s information, including the device
name, location (if entered by the user), device type, and
Modbus address.
Scroll to the particular device of interest and press
SELECT to view detailed information for the chosen
device. The first screen of detailed device information
appears, presented in a tabular format. There may be as
many as 10 screens per device. An example of a device
data screen is shown below:
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Figure 40. Device Data screen.
NOTE: The first time you view the data for a particular
device, the data fields will contain asterisks
momentarily, while the Monitor collects the real-time
data. When the data is received, the asterisks are
replaced by real values.
Also worth noting is the fact that, in some cases, N/A
(not available) may be displayed in particular data fields.
This happens in cases where the particular field does not
make sense in the real-world context of the device. For
example, if a device is set up to meter phase voltages,
and the electrical configuration of the circuit that the
device is metering is a DELTA configuration (as
opposed to WYE), then voltages relative to Neutral are
meaningless. In this case, data fields associated with
Phase to Neutral voltages will contain N/A.
The Monitor supports up to ten pages of data for each
device, and you may scroll through these pages using the
Monitor’s keypad, pressing the page up and page down
arrows. Help for the particular device being viewed is
available by pressing the HELP key
Up to this point, you have been working “vertically”;
that is, one screen is always parent to another and you
may opt to return to a previous screen or move to a sub
screen. From the View Device screen, however, you may
page between the current device and the last device
viewed by using the PREVIOUS DEVICE key. When
you page between the current and the last-viewed device,
the buffered information held in the Monitor’s memory
is presented on the display. However, this data may be
somewhat aged (stale). The ‘staleness’ of the data may
be checked by looking at the LAST UPDATE field next
to the DATE/TIME field. The LAST UPDATE field
indicates how long in hours and minutes it has been
since the data was received at the Monitor. This field
also provides a means to check if a device has gone
“dead”- the DATA AGE counter only accumulates up to
99 hours and 59 minutes and does not roll over; if the
data age is 99 hours, 59 minutes, there’s a good chance
that the device in question is dead and should be
checked.
A visual representation of the screen hierarchy is
presented in Figure 41.