Siemens SX Series User's Guide Page 31

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Siemens Desigo SX Open - SX Configurator, V2.1 CM110702en_06
Building Technologies Worksheets in SX Configurator 20 Mar 2012
5.1.3 Default mapping
An OPC item consists of:
Name
Value
Status
Time stamp
Activating Default Mapping means that not only is the item value mapped to [PrVal] of
the BACnet object, but also that the OPC status is mapped, more or less invisibly, to
the relevant alarm properties of the same object. Depending on the OPC status, the
alarm state on the BACnet side is then NORMAL or an OFFNORMAL or FAULT alarm.
Even if Default Mapping is active, it can still be enabled or disabled individually for
each value to be mapped, via the Avoid Default Mapping column of the
Configuration sheet.
SX Open can generate default mappings based on the OPC Quality. This generates
the following mapping information for each BACnet object defined as [PrVal]. The
object information relates to Reliability, Out_of_Service
and Overridden in
Status_Flags:
OPC BACnet
Quality Substatus Reliability Out_Of_
Service
Overridden in
Status_Flags
0x00 Bad 0 Non-specific 7 Unreliable-other False False
0x04 Bad 1 Configuration error 2 Over range False False
0x08 Bad 2 Not connected 5 Shorted-loop False False
0x0c Bad 3 Device Failure 4 Open-loop False False
0x10 Bad 4 Sensor Failure 1 No-sensor False False
0x14 Bad 5 Last Known Value 5 Shorted-loop False False
0x18 Bad 6 Comm Failure 4 Open-loop False False
0x1C Bad 7 Out of Service 0 No-fault-
detected
TRUE False
0x40 Uncertain 0 Non-specific 7 Unreliable-other False False
0x44 Uncertain 1 Last usable value 6 No-output False False
0x50 Uncertain 4 Sensor not accurate 1 No-sensor False False
0x54 Uncertain 5 Eng. Units exceed. 8 Process-error False False
0x58 Uncertain 6 Sub-normal 7 Unreliable-other False False
0xC0 Good 0 Non-specific 0 No-fault-
detected
False False
0xD8 Good 6 Local 0 No-fault-
detected
False TRUE
The default mapping is generated only if Use Default Mapping in the Cover sheet is
not blank, and
only for objects for which the Avoid Default Mapping cell is left blank.
Note
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