UMAX140900RST. Ethernet to CAN Converter. Version 1
Page: 17-41
Once the filter is activated by checking the
On/Off
box, the CAN input messages will pass
through the filter to the Ethernet network only if their CAN ID satisfies the following condition:
𝐼𝑓 𝐼𝐷 = 𝐼𝐷
𝐶𝐴𝑁
& 𝑀𝑎𝑠𝑘, 𝑡ℎ𝑒𝑛 𝑡ℎ𝑒 𝑚𝑒𝑠𝑠𝑎𝑔𝑒 𝑖𝑠 𝑎𝑐𝑐𝑒𝑝𝑡𝑒𝑑.
(2)
Where:
𝐼𝐷
𝐶𝐴𝑁
– CAN message ID,
𝑀𝑎𝑠𝑘
–
Mask
configuration parameter,
𝐼𝐷
–
ID
configuration parameter,
&
– Bitwise AND operator.
The
EID
box (
Extended ID
box) defines whether the CAN message ID is regular or extended.
All CAN ID mask filters run in parallel the same way as CAN ID range filters. It is sufficient to
satisfy requirements of any active filter to send the CAN message to the Ethernet network.
If no active filters are defined, it is considered that the CAN ID mask filters are disabled, and do
not participate in the message filtering process. In this case,
ID Mask Filters
are
Off
on the
home page, and, if other filters are also disabled, all CAN input messages will be sent to the
Ethernet network.
