Each Bacnet file descriptor has various properties that affect its BACnet representation. Access these properties in the property sheet view of any export descriptor, as shown in Figure 91.
The following list describes additional properties in Bacnet file descriptors, not seen in the or dialog for the component:
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Status
Niagara-only, read-only status flag for the file descriptor component.
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Fault Cause
Niagara-only, read-only property showing an explanatory text string if the file descriptor is in fault. For example, if its Object Id is manually edited to be the same as another existing file descriptor—a fault occurs and the Fault Cause would be “
Duplicate Object ID.” -
File Type
BACnet property, as a text string intended to identify the use of this file. Default value is blank, however, the actual exported BACnet File object contains some default value, such as “
text/plain” or “application/zip”. -
Archive Time
Timestamp compared against the actual file timestamp, in order to set the BACnet property “Archive” (True if Archive Time < file timestamp, or False if Archive Time > file timestamp).
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File Access Method
Read-only BACnet property that indicates the types of file access supported. Currently, this is Stream Access only.
Additional properties in the exported File object exist, even though not visible in the Bacnet File Descriptor property sheet.
These properties include:
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File Size (integer, in bytes)
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Modification Date (actual file timestamp)
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Archive (True or False, see “Archive Time” property above)
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Read Only (True or False, as determined by the local Java file system)