Totaliser Function; Calculation - WIKA DI35-M Betriebsanleitung

7. Description of program numbers
7.8

Totaliser function

The totaliser function sums measuring results which are determined as the result of a
programmable calculation. The measuring results are summed until a reset is carried
out.
EN

7.8.1 Calculation

PN Function
180 Totaliser function
181 Time basis of the display value
182 Factor in powers of 10
183 Decimal place
In order to calculate a totaliser value, the time basis and the unit are of particular
importance. The flow is defined in volume per time and the speed with distance per time.
Through parameterisation of the time basis (PN181), the totaliser value is summed.
Example
If a sensor measures 1,200 l/h, with a measurement time of 1 s, one must only sum a
3,600th fraction of the litres counted, which, in this case, would be approx. 0.333 litres
per measuring cycle. Despite this very small size, the totaliser value can sum up to an
extremely high value within a timespan of one year. In this example, that means there
were approximately 10,512,000 litres in one year.
An indication in cubic metres would be useful here. In order to realise this, one must
define a factor - in our example PN182 = 3 (10
converted into cubic metres.
If one only wishes to integrate the quantity only over one month, one can still add a
decimal point to the visualisation as cubic metres under PN183.
If one now parameterises the factor PN182 = 2 and the decimal point PN183 = 1, this
would lead to a display of 864.0 cubic metres at the end of a month.
44
Parameter
0 = off
1 = totaliser function without perma-
2 = totaliser function with permanent
0 = second
1 = minute
2 = hour
0 = 1 ... 6 = 1,000,000
00000 ... 0.0000
). With this, the value in litres can be
-3
WIKA operating instructions digital indicator, model DI35-M
nent storage (reset on restart)
storage