25
3.5.6
Maximum demand calculation
At the end of each registration period, the unit compares the current de-
mand value with the highest value registered so far. If the new value is
higher, then it will be stored together with date and time, separate for each
rate. This calculation only takes place for registration period Tm1. Current
maximum demand values and register contents can be retrieved via remote
data retrieval (currently only possible with SCTM protocol). Starting from
version 1.04.00, a maximum demand is also calculated without regard to
rates (in addition to the rate related values, and considering all days from
00:00 to 24:00).
3.5.7
Maximum demand reset
With a maximum demand reset the values for maximum demand of regis-
tration period Tm1 and the current energy register values are transferred
into the periodical buffer and then set to zero, to enable a new maximum
demand calculation. In addition, the values of the cumulative energy regis-
ters will be stored.
The reset can be activated in three ways:
1. Via control input RSTX. The unit will execute the reset approx. 200ms after the
change of the voltage level at RSTX.
2. Via internal clock automatically once per day, week, month or year. The time
can be selected without limitation.
3. Manually via the keypad (password protected).
All three methods can be enabled or disabled separately by means of set-
ting the relevant parameters. Only one reset is allowed for each registration
period Tm1. After a reset the next reset can be suppressed for a maximum
of 99 registration periods Tm1 (so called reset blockage).
3.5.8
Periodical buffer (Billing data)
Upon each reset, the DLX unit stores the maximum demand values, the
energy increment since the last reset (from the current energy registers)
and the value of the cumulative energy registers at the time of the last
completed registration period Tm1. These values are available on the dis-
play of the unit. The DLX will store at least the values of the last 20 resets.
Using remote data retrieval (currently only available for SCTM protocol),
maximum demand values and register readings for the last 9 reset actions
can be retrieved.
Summary of Contents for DLX
Page 9: ...9 1 Scope of Application 1 1 Application environment Figure 1 Application environment...
Page 42: ...42 4 2 Installation diagram Figure 13 Dimensions of mounting points...
Page 54: ...54 7 Menus 7 1 Flow diagram Figure 24 Flow diagram of menus...
Page 110: ...Subject to change without notice...
Page 111: ...E116012215052 Appendix A Data Retrieval Protocols...
Page 112: ...A 2...
Page 156: ...Subject to change without notice...
Page 157: ...E116012215052 Appendix B Table Addresses...
Page 158: ...B 2...
Page 170: ...Subject to change without notice...
Page 171: ...E116012215052 Appendix C List of Parameters and Constants...
Page 172: ...C 2...
Page 178: ...Subject to change without notice...
