Belimo NMV-D2M - Page 30

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4A1PC-T V2.1 NMV-D2M-EN 11-02-04.doc PM VAV - Subject to technical changes
VAV – Module NMV-D2M
N-S4 Trend
The Trend function has been provided so that the control parameters of
VAV / CAV-boxes equipped with a Belimo VAV-Compact NMV-D2M can
be checked. A full analysis of these values provides information on the
system supply pressure and the dynamic behaviour of the air box and its
control system (e.g.: room temperature controller, DDC, step control).
There are two methods available: ‘Live Trend’ and ‘Trend Recall’. In the
case of the former the data is recorded ‘live’ and presented as a diagram
on the screen in real time. With the latter, data that has been recorded
previously is read from the data carrier and displayed on the screen.
N-S4.1 Trend – Description of the elements
Project &
controller data
Operating values
of volumetric flow
rate
V’nom -
V’max -
V’min -
Control limit -
Start-
Stop
Data source
Trend data
- V’nom
- V’min / V’max
- Setpoint / Actual value
- Damper position
- Control limit
Legend
with voltmeter function
Fwd / Back
display + / -
Trend Recall
Print options
Project Data form / <F4> /
Abort
Project data
- Project
- File name
- Comments
Project Data form <F4>
This allows the project-specific and trend-
specific data, such as file names, to be en-
tered.
The data is used by the log, print, trend and
test functions. The data entries remain valid
until they are changed or deleted.
-> Blank fields are allowed