Outside Temperature Simulation; Fault Handling - Siemens Synco 700 Series Basic Documentation

Caution
Note
Fault status messages
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12.3.1 Outside temperature simulation

To test the response of the plant, an outside temperature can be simulated and the
measured value of the outside temperature (outside sensor or bus) can be overridden.
Main menu > Miscellaneous > Inputs
Operating line
Outside temperature simulation
During the simulation, it is also the simulated outside temperature that is used for the
composite and the attenuated outside temperature.
The simulation is not automatically terminated (no time-out supervision!).
The inputs should only be overridden by qualified staff and within a limited period of
time only!
During the simulation, fault status message "Outside sensor simulation active" appears.
This message is present until the outside temperature simulation is set back to "----".
This is to make certain that the plant cannot be quit without terminating the simulation.
The simulated outside temperature is only used locally. It is not delivered to other
controllers via bus; the temperature transmitted is still the measured value of the con-
nected outside sensor.

12.3.2 Fault handling

When leaving the Commissioning menu, a check is made to see if the outside sensor is
connected or if the bus receives a sensor value. In the case of an open-circuit or short-
circuit, fault status message "Outside temp sensor error" appears. Internally, the con-
troller continues to operate using 0 °C as a backup value.
Fault status message "Outside temp sensor error" also appears when there is no signal
via bus. If other outside temperatures are available via bus, the one used is the outside
temperature first transmitted.
Only 1 outside temperature can be present in the same zone. If several controllers send
their outside temperature to the same zone, fault status message ">1 outside tempera-
ture sensor" is delivered.
Number Text
10 Outside temp
sensor error
11 >1 outside tem-
perature sensor
12 Outs sensor
simulation active
Boiler Sequence Controller RMK770
12 Function block "Miscellaneous"
Range
---- / –50.0...+50.0 °C
Effect
Nonurgent message; must not be acknowledged
Urgent message; must be acknowledged
Nonurgent message; must not be acknowledged
Factory setting
----
CE1P3132en
23.04.2009