Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 5 General functions, fundamentals 2017-09-29
On completion of the holiday period or the special day, operation according to the
normal 7-day program will be resumed. During this transition period, it can occur that
optimum start control (e.g. boost heating) cannot be started in due time. It is therefore
recommended to bring the end of the holiday period somewhat forward, giving the plant
sufficient time to adapt to the respective setpoints.
5.2.5 Control inputs for holidays and special days
Holidays and special days can also be activated via digital inputs. For that, the
respective function must be assigned an input. Every holidays / special day program
has its own inputs.
Main menu > Commissioning > Extra configuration > Heating circuit 1 (or 2 or 3) > Inputs
Main menu > Commissioning > Extra configuration > DHW > Inputs
Operating line
Range
Factory setting
Special day input
--- / RMH760… etc.*
---
Holiday input
--- / RMH760… etc.*
---
* These inputs are only active if holidays/special day operation has been set to "Autonomous" or "Master".
The digital input enables the plant to be switched to the special day program set in the
7-day program. If the configured input is activated, the special day program will become
active. This state is maintained until the input becomes inactive. Then, the normal 7-
day program will be resumed.
The digital input enables the plant to be switched to "Holidays" mode.
When the configured input is activated, the plant switches to "Holidays" mode. This
state is maintained until the input becomes inactive. Then, the normal 7-day program
will be resumed.
If, at the same time, a special day or a holiday period is activated via the control
switches and an entry in the calendar, the following priority will apply:
1. Control switch "Special day"
2. Control switch "Holidays"
3. "Special day" entry in the calendar
4. "Holidays" entry in the calendar
If other controllers are also configured as slaves in the same holidays / special day
zone, the digital inputs will act on these controllers also.
5.2.6 Fault handling
Only one master may be set per holidays / special day zone. If there is more than one
master in a zone, fault status message
>1 hol/sp day prgm HC 1 (or …HC 2 or …HC 3 or …DHW) will be delivered.
The fault is identified by the holidays / special day master (A) when it receives a
holidays / special day signal from some other master (B) in its zone. Master "A" will
then display a fault status message and forward it, but no more holidays / special day
signal, in order to prevent the slaves from switching back and forth.
If the controller expects a holidays / special day signal from the bus, but same signal is
not transmitted, fault status message Hol/sp day prgm failure HC 1 (or HC 2 or HC 3 or
DHW) will be delivered.
The operating modes of the 7-day program are used, without giving consideration to
the holidays / special day entries.
Note
Setting
Special day
Holidays
Priority
Note