I-7530, I-7530A, I-7565, I-7530-FT, tM-7530, tM-7530A, tM-7565 User Manual Version 1.6
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5.5 CAN ID filter setting
The CAN converter can be set to filter the CAN messages of some CAN IDs, so
that these CAN messages will not be transmitted to the RS -232/485/422/USB port. If
the user want to enable this function need to adjust parameters such as acceptance
code (ACC) and acceptance mask (ACM).
ACC: CAN ID bits to be received.
ACM: CAN ID bits to be filtered.
In the ACC, when the bit is set to 1, it represents the CAN ID bit to be received. In
addition, in the ACM, when the bit is set to 1, it repr esents the CAN ID bit to be filtered.
The example as below:
(1) If want to receive all CAN messages can set to:
In CAN 2.0A
：
Acceptance Code
：
Ignorable
Acceptance Mask
：
000
(2) If only receiving CAN ID bits of "123" (hexadecimal) and filtering all other
messages can set to:
In CAN 2.0A
：
Acceptance Code
：
123 (001 0010 0011 bit)
Acceptance Mask
：
7FF (111 1111 1111 bit)
(3) If only get the CAN ID range from "100" to "13F" (hexadecimal), and filter out other
CAN messages can set to:
In CAN 2.0A
：
Acceptance Code
：
1XX (001 00XX XXXX bit) (X: Ignorable)
Acceptance Mask
：
7C0 (111 1100 0000 bit)
(4) The settings of CAN 2.0A and CAN 2.0B are the same, and the difference between
CAN 2.0A and CAN 2.0B is the bit length of CAN ID.
In CAN 2.0A
：
The CAN ID bit length is 11.
In CAN 2.0B
：
The CAN ID bit length is 29.
