Description
3.4 Load profile
SENTRON PAC4200
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System Manual, 09/2009, A5E02316180B-02
Synchronization types
The device can obtain the synchronization pulse from an external source
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As a signal at the digital input,
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As a command via the communication interfaces.
The device can control the synchronization itself
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By means of the internal clock.
Handling of irregular, external synchronization pulses
SENTRON PAC4200 checks whether the external synchronization pulse is received at the
set time, too soon, too late, or not at all. If the deviation from the set time exceeds a defined
tolerance, this results in a shorter period.
If the complete time frame for received pulses is offset, SENTRON PAC4200 automatically
adapts to the new time frame.
Synchronization via the communication interface
The synchronization frame contains the length of the subperiod in minutes. The
synchronization command is ignored if the period length sent to the device with the
synchronization frame is different to the length parameterized in the device.
Synchronization with the internal clock
The length of the subperiod, and thus also the demand period, is determined solely by the
internal clock.
A subperiod starts on the full hour plus a multiple of the configured subperiod length.
Correction of the time during the current demand period or beyond the end of the demand
period results in shorter demand periods. SENTRON PAC4200 marks these periods with the
valuation indicator "resynchronized".
It does not record any substitute values for the gaps that are created in the time history.
Response to powering up
All load profiles that have already been recorded remain unchanged.
SENTRON PAC4200 resets the internal clock if it detects load profiles with a date in the
future or a time in the past on powering up.
Impact of a tariff change on the load profile
Tariff changes between off-peak and on-peak have an impact on the load profile because all
values stored in the profile are uniquely assigned to the applicable tariff.
The old tariff remains valid until the end of the instantaneous period. The new tariff takes
effect at the start of the next period. The energy counters of SENTRON PAC4200 are
switched to the other tariff at the end of the instantaneous demand period.
Содержание PAC4200
Страница 16: ...Introduction 1 6 Further documentation SENTRON PAC4200 16 System Manual 09 2009 A5E02316180B 02 ...
Страница 66: ...Operation planning 4 1 Operation planning SENTRON PAC4200 66 System Manual 09 2009 A5E02316180B 02 ...
Страница 174: ...Service and maintenance 10 6 Disposal SENTRON PAC4200 174 System Manual 09 2009 A5E02316180B 02 ...
Страница 284: ...Index SENTRON PAC4200 284 System Manual 09 2009 A5E02316180B 02 ...