Variable names for bus devices

The ADI line supports the following variables for a bus device:

Note: The "C" column indicates whether the variable returns a constant value.

Variable name	Data format	I/O	C	Devices	Description
CompatibilityId	VT=u16	R	1	APC910 PPC900	Bus unit compatibility ID.
DeviceId	VT=u32	R	1	APC910 PPC900	Bus unit device ID.
FactorySettings	VT=u8 VN=256	R	1	APC910 PPC900	Bus unit factory settings. For B&R-internal use only!
FactorySettingsVersion	VT=string VL=8	R	1	APC910 PPC900	Version of factory settings Example: "1.2"
HardwareRevision	VT=string VL=5	R	1	APC910 PPC900	Bus unit hardware revision.
ModelNumber	VT=string VL=41	R	1	APC910 PPC900	Bus unit model number.
ParentCompatibilityId	VT=u16	R	ü	APC910 PPC900	Bus unit parent compatibility ID (FFFFh = no parent). Specifies the compatibility ID of the bus unit from which the current device was derived (e.g. for a custom variant of a standard device).
ParentDeviceId	VT=u32	R	ü	APC910 PPC900	Bus unit parent device ID (FFFFFFFFh = no parent). Specifies the device ID of the bus unit from which the current device was derived (e.g. for a custom variant of a standard device).
PowerOnCycles	VT=u16	R	ü	APC910 PPC900	Number of power-ons for the bus unit.
PowerOnHours	VT=u16	R		APC910 PPC900	Number of operating hours for the bus unit.
Present	VT=boolean	R	ü	APC910 PPC900	Indicates whether bus unit is installed: 0 = Not provided 1 = Provided
SerialNumber	VT=string VL=12	R	1	APC910 PPC900	Bus unit serial number.
VendorId	VT=u32	R	1	APC910 PPC900	Manufacturer ID of the bus unit (B&R = 0).

1	The value can only be modified by updating the factory settings.