Manual WS.502 v1.5
2-Wire Energy Monitor
14
If we press 'SAVE LOGIC',
the module is adjusted
according to the energy
type: in this case we see
the current consumption
in litres on the left,
and on the right are the
corresponding names of
the outputs (Volt-Amp
does not exist here)
In this way, we will continue with any other energy
modules, or we will first further elaborate this logic.
The assignment was to check the current stock of fuel
oil (approximate) and give a warning if the level is too
low.
To do this, we need a 'CREDIT' module: select it with
the left mouse button. You can drag the module to
the desired position on your screen. (click the left
mouse button when you're standing over this module
and drag the module).
Zoom in or out
of the screen
using the mouse's 'scroll' wheel. You can move the full
screen by standing in a 'blank' place on the screen and
pressing the left mouse button. You can now bring the
full screen to the desired position and zoom in or out
according to your preference.
With a 'CREDIT' module, we need a 'starting value', a
minimum level (Bottom Value), and the desired units
(in this case L Fuel).
As an example, we start with 1000 litres of fuel oil,
and we want an alarm if the residual value is less than
100 litres. In 'Bottom Value' we now fill in '< 100'. (< =
smaller than, > = larger than)
If we want to see the result in a graph, we need to
create a 'log module' in the configuration! (see
later:
log module 04Lxxxxx
)
The start value entered must be 'activated' when the
tank is filled.
For this, there is a 'Reset' button: Select it and
click
'NOW'.
A confirmation is requested, because from this
moment on the residual value (Credit) will be equal to
the completed starting value. Over time, the credit
value will decrease according to consumption.
In the log chart we can now see both the consumption
and the remaining quantity.
When the bottom value is exceeded, an 'alert' may
follow in the form of a relay which is switched on (e.g.
signalling light) or an e-mail (daily) sent.
Attention! The graph can also go negative (tank 'army
then empty'...)