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The number of digits for energy register is set to 9 (for version 1.04.00 and
up). This includes digits to the left and to the right of the decimal point (e.g.
with one decimal place : 12345678.9). If an energy register exceeds the
value 999999999, it continues at the value 000000000 and a flag will be set
in the device status register (of that registration period).
All pulse inputs arrive in two separate energy registers and one pulse regis-
ter:
• Cumulative register (settable), in which the meter reading of the supplying
meter can be adjusted for control and check purposes.
• Current (cannot be modified externally), which registers the flow of energy
since the last reset.
• Pulse register (control register, cannot be modified externally), counts all
incoming pulses from the related input without weighting.
Furthermore the energy increment since the end of the last registration pe-
riod is calculated for both registration periods (Tm1 and Tm2). By multipli-
cation with the time factor, these values are converted into demand values.
Tm
60
TF
= : weightingvalue Demand
– TF : Time factor
– Tm : Registration period (in minutes)
The energy increment registers (and therefore also the demand registers)
are reset to 0 at the beginning of each new registration period.
Example: Registration period: Tm1 = 15 min.
Time factor: TF = 60/15 = 4
Energy increment: ∆E = 25 kWh
→ Demand: P = ∆E × TF = 100 kW
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