BL20 - Communication in CANopen
D301087 0308 - BL20 CANopen4-264
Representation of diagnostics data
The 8 bytes of diagnostics data for the BL20-E-1SWIRE module are
represented by the manufacturer specific objects of the CANopen
gateway.
The following manufacturer specific objects for representing the
diagnostics data are used:
3040hex, “XBI Diag Byte”, ARRAY, Unsigned8
3042hex, “XBI Diag Word”, ARRAY, Unsigned16
3044hex, “XBI Diag Dword”, ARRAY, Unsigned32
3045hex, “XBI Diag Dword2”, ARRAY, Unsigned32
3046hex, “XBI Diag Dword3”, ARRAY, Unsigned32
3047hex, “XBI Diag Dword4”, ARRAY, Unsigned32
The objects have the following structure:
The objects have a maximum of 74 sub-indexes. This number
corresponds to the number of modules that are present on a
BL20 station. The sub-index corresponds to the module number
of the BL20 module.
A sub-index can represent a maximum of 4 bytes. Larger diag-
nostics data volumes are distributed on the following objects.
The sub-index also belongs to the module number.
The following table shows the assignment of the diagnostics data
bytes of the BL20-E-1SWIRE module to the manufacturer specific
objects:
Byte no.0 123456789101112131415
8 diagnostic bytes of BL20-E-1SWIRE
free
Object no.
in (hex)
3044
(see page 4-271)
3045
(see page 4-272)
3046 3047
3042
(only the first 2 bytes are shown)
3040 (only the first byte is shown
Note
Use the objects 3044
hex
and 3045
hex
to access all the diagnostics
data!
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