CAN-AIR/2 Configuration
4.6.2 29-Bit Identifier
For the filtering of 29-bit identifiers
Mask
and
Match
values can be specified to include or exclude
identifiers.
Figure 27:
29 Bit Identifier
pass through all 29 bit
Clicking the button sets the default values for
Mask
and
Match
, that
let all identifiers pass as follows:
- Included IDs:
Mask = '0'
,
Match
= '0'
- Excluded IDs:
Mask = '0'
,
Match
= '1'
block all 29 bit
Clicking the button sets values for
Mask
and
Match
, that will block all
identifiers as follows:
- Included IDs:
Mask = '0'
,
Match
= '1'
- Excluded IDs:
Mask = '0'
,
Match
= '0'
With
Mask
you can specify whether single bits of the identifier are relevant for the CAN-identifier
filtering or not.
Bit set to Meaning
'0'
not relevant for filtering
The identifier bit will become '0' after bitwise AND and
thus the real value of the identifier bit will become
irrelevant to this filter!
'1'
relevant for filtering
The identifier bit is conserved by the bitwise AND and
thus the value of the identifier bit is relevant to this filter
and must match
Match
to pass the filter!
With
Match
you define the value, the resulting bits (after bitwise AND of identifier and
Mask
) must
match to pass the filter (
Included IDs
) or to be excluded (
Excluded IDs
).
An identifier that can pass the filter according to the settings of the
Included IDs
can be blocked by
the settings of the
Excluded IDs.
The criteria for exclusion are decisive.
CAN-AIR/2
Hardware Manual • Doc. No.: C.2067.21 / Rev. 1.5
Page 29 of 53
