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Siemens Building Technologies
Basic Documentation RVL471
CE1P2524E
HVAC Products
24 Function block "Switching program 3"
23.10.2002
24 Function block "Switching program 3"
Switching program 3 of this function block can be used for one or several of the follow-
ing functions:
•
As a time switch program for the circulating pump (operating line 122)
•
As a time switch program for the multifunctional relay (operating lines 141 and 146)
24.1 Operating lines
Line
Function, parameter
Unit
Factory
setting
Range
151
Weekday for switching program 3
1-7
1...7, 1-7
152
Start of first ON period
hh:mm
06:00
--:-- / 00:00...24:00
153
End of first ON period
hh:mm
22:00
--:-- / 00:00...24:00
154
Start of second ON period
hh:mm
--:--
--:-- / 00:00...24:00
155
End of second ON period
hh:mm
--:--
--:-- / 00:00...24:00
156
Start of third ON period
hh:mm
--:--
--:-- / 00:00...24:00
157
End of third ON period
hh:mm
--:--
--:-- / 00:00...24:00
24.2 Function
Switching program 3 of the RVL471 affords a maximum of 3 ON periods per day. Also,
every day of week may have different ON periods.
As with the heating program, it is not switching times that are entered, but periods of
time during which the program or the controlled function shall be active.
Using the setting "1-7" on operating line 151, it is possible to enter a heating program
that applies to all days of the week. This simplifies the settings: If the weekend times
differ, enter the times for the entire week first, and then change days 6 and 7 as re-
quired.
The entries are sorted and overlapping ON periods combined.
