Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Aggregates 03.10.2011
10.1.6 Locking speed 2 at low outside temperatures
If the fan is run as a 2-speed fan (via relay or continuous output), the following
function is available: Speed 2 can be locked at low outside temperatures.
If the outside temperature again exceeds the set value by 2 K, speed 2 is released
again.
If locking by outside temperature is not desired, set the corresponding value to "- --
-".
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Supply air fan >
Operating line Range Factory setting
Speed 2 locked (OT-
dependent)
----, 50...150 °C
----
If the outside temperature is missing and function "Speed 2 locked (OT-
dependent)" is active, speed 2 is locked.
10.1.7 Flow signal (
V
)
Flow supervision can be provided by a flow switch or flow sensor.
Main menu > Commissioning > Extra configuration > Aggregates > Supply air fan >
Main menu > Commissioning > Extra configuration > Aggregates > Extract air fan >
Operating line Adjustable values / remarks
Flow signal ---, N.X1, N.X2, ... (digital and analog inputs)
*)
*) With analog inputs, only inputs with units m/s, bar, mbar, Pa, Universal 000.0, Universal 0000 are
possible
If the fan is to be switched on and if there is no feedback signal after a definable
period of time (Flow delay start), a message appears and the plant is shut down. If
the signal is lost during operation, a message appears also and the plant is shut
down. Since measurements can fluctuate during operation, a delay time can be set
(Flow delay operation).
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Supply air fan >
Main menu > Settings > Aggregates > Extract air fan >
Operating line Range Factory setting
Flow delay start 00.00...59.55 m:s 02.00 m:s
Flow delay operation 00.00...59.55 m:s 00.05 m:s
The switching values for the flow fault can be set.
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Supply air fan >
Main menu > Settings > Aggregates > Extract air fan >
Operating line Range Factory setting
Flow switching value on Depending on selected type Depending on type
Flow switching value off Depending on selected type Depending on type
Setting values
Configuration
Setting values
Setting values