Siemens SENTRON PAC4200 - Page 31

Description
3.4 Load profile
SENTRON PAC4200
Manual, 09/2008, A5E02316180B-01
31
Rolling block method
The rolling block method divides the demand period into subperiods. The load profile data is
calculated and stored at the end of each demand period or subperiod.
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Figure 3-4 Load profile, rolling block method
Parameterizing the fixed block and rolling block methods
SENTRON PAC4200 supports the fixed block method as a special case of the rolling block
method. The most important distinguishing feature is the number of subperiods.
Number of subperiods:
The demand period can be divided into a maximum of five subperiods.
● The number "1" defines the fixed block method. In this case, the length of the subperiod
is identical to the length of the demand period.
● The numbers "2" to "5" define the rolling block method.
Length of subperiods:
The length of a subperiod is an integer part of a full hour. The device allows the following
lengths in minutes:
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 min
Length of demand period:
The length of the demand period cannot be directly configured. It is defined as the product of
the length of a subperiod and the number of subperiods.
Length
demand_period
= n • length
subperiod
; n = number of subperiods