Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Aggregates 03.10.2011
If a flow fault occurs at the fan, the plant is shut down. One of the following flow
messages appears.
No. Text Effect
1112 Supply airflow error Urgent message, with plant stop; must be
acknowledged and reset
1122 Extract airflow error Urgent message, with plant stop; must be
acknowledged and reset
10.1.8 Overload signal ( )
Here, e.g. overload supervision of a motor protection switch can be connected.
Main menu > Commissioning > Extra configuration > Aggregates > Supply air fan >
Main menu > Commissioning > Extra configuration > Aggregates > Extract air fan >
Operating line Adjustable values / remarks
Overload signal ---, N.X1, N.X2, ... (digital inputs only)
If an overload signal is present at this input, a message appears and the plant is
shut down.
The plant restarts as soon as the signal is no longer present.
No. Text Effect
1111 Supply air overload Urgent message with plant stop; must be
acknowledged
1121 Extract air overload Urgent message with plant stop; must be
acknowledged
10.1.9 Precommand
For each fan, an associated precommand can be configured. This allows e.g. to
open a damper prior to actual fan start as well as shut the damper delayed
following fan switch-off.
Main menu > Commissioning > Extra configuration > Aggregates > Supply air fan >
Main menu > Commissioning > Extra configuration > Aggregates > Extract air fan >
Operating line Adjustable values / remarks
Precommand ---, N.Q1, N.Q2, ... (free outputs only)
The precommand allows for starting or stopping the fans either simultaneously or
delayed. Delayed switch-on/switch-off is set via the Precommand runup time and
Precommand rundown (coasting) time.
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Supply air fan >
Main menu > Settings > Aggregates > Extract air fan >
Operating line Range Factory setting
Precommand runup time 00.00…59.59 m:s 00.30 m:s
Precommand rundown time 00.00…59.59 m:s 00.30 m:s
Fault status messages
Configuration
Fault status messages
Configuration
Setting values