Momentary Use

The momentary use is the energy/ volume usage at this particular moment. The value can be converted to kW or m3/h, etc. The physical output "MomentaryUse" provides this value without respect of the engineering unit.

The calculation algorithm for the momentary use uses a sliding window with an interval time of MEU-01 seconds. The momentary energy use will be calculated as shown in the formula below:

MomentaryUse = (Number of pulses in interval)/ interval Multiplier * CNT-01


The minimum of the interval MEU-01 is 2 seconds * 72 = 144. For longer cycle times calculation of the momentary use is correct, only the sample interval increases.

The interval is MEU-01 in seconds if MEU-02 = 0 or MEU-01 in hours if MEU-02 = 1. The fewer pulses the meter delivers, the longer this time interval has to be made. The calculated value is the number of pulses per time unit (seconds/hours). This is the reason why the counted value is divided by the resulting time interval MEU-01 or MEU-01 * 3600.

The multiplier depends on the time unit of the currently used value:

To adjust the multiplier, you can set the value of the parameter MEU-02 as shown in the next table.

Table 1.   MEU-02 Settings

Output engineering unit

MEU-02

Multiplier

Comment

W, kW, l/sec

0

1

All units per second

m3/h

1

3600

All units per hour

In order to get the momentary consumption, the result is transmitted each minute to the output "MomentaryUse".

Table 2.   Parameter List

Description

Value Range

Default Value

Unit

CNT-01: scaling factor

1…100000

1

-

MEU-01: time interval for momentary use calculation

150…3600

300

sec

MEU-02: time unit for momentary energy use; 0 = second; 1 = hour

0 / 1

0

-