Siemens RDF302/VB User Manual

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Siemens RDF302 Basic documentation CE1P3079en
Smart Infrastructure 2022-06-17
3.2.1 Different ways to influence the operating mode
The operating mode can be influenced by different interventions. The table below
shows the priorities of different interventions. (i.e. lower number higher priority)
Priority
Description
Remark

Commissioning
In parameter setting mode (highest priority), you can
always command an operating mode independent of
all other settings or intervention via Modbus and local
input.
If P02 changed by Modbus, the operating mode will
jump to Protection mode, in all cases, after the
update.

Operating mode
switchover
contact
If the contact is closed, the operating mode changes
to Economy. This overrides the operating mode on
the thermostat.

"Window state"
via Modbus
"Window state" sent via Modbus has the same effect
as the operating mode switchover contact.
Note: Only one input source must be used, either local input X1/X2 or
Modbus. RDF302.B does not have inputs X1 and X2.

Operating mode
via Modbus
The operating mode can be changed via Modbus
Note: Operating mode button is disabled if Protection
mode is commanded via Modbus. If a bus command
is received via MODBUS for either COMFORT or
ECONOMY operating mode, the symbol of the
selected operating mode will be displayed.
i.e. either COMFORT or ECONOMY symbol only
If a bus command is received for PROTECTION
mode, the AUTO TIMER symbol ( ) will be
displayed and all key buttons will be de-activated.
i.e. both PROTECTION and AUTO TIMER symbols

Operating mode
button
The user can switch the operating mode via the
operating mode button unless a key lock command
received from the Modbus before.
Note: Higher priority commands can override the lower priority’s
command. If operating mode is set via Modbus, the unit will indicate by
flashing “OFF” when OpMode button pressed by users.
The operating mode can be selected locally via the operating mode button.
The behavior of the operating mode button (user profile) can be defined via
parameter P02, factory setting is P02 = 1.
P02
Without time
schedule
Description
1
→
• Switching manually between 2 modes, Economy is
not available (factory setting)
• Suited for hotel guest rooms or commercial
buildings.
2
→ →
• Switching manually between 3 modes
• Suited for homes and rooms where manual
switching to Economy mode is desired
Priority of operating
mode interventions
Availability of Economy
mode

Siemens RDF302/VB Specifications

General

Brand	Siemens
Model	RDF302/VB
Category	Thermostat
Language	English