Appendix D. Filter setting
The I-7530 series modules use acceptance code and acceptance mask for filter setting. The
acceptance code and acceptance mask are used for filtering unnecessary CAN messages
through RS-232/RS-485/RS422/USB port. If users want to prevent the unnecessary CAN
message through Re-conversions, they need to set the parameters of acceptance code and
mask.
Acceptance Code: The CAN ID bits that you want to get.
Acceptance Mask: The CAN ID bits that you want to filter.
In the acceptance code, the bit value ‘1’ means that you want to get this CAN ID bit. And in the
acceptance mask, the bit value ‘1‘ means that you want to filter this CAN ID bit. For Examples:
(1) If users want to get all the messages on the CAN bus, the setting must be as follow:
In CAN 2.0A: Acceptance Code: Don’t care
Acceptance Mask: 000
(2) If users want to get the message of CAN ID “123” (Hex) and filter all the other CAN message,
the setting must be as follow:
In CAN 2.0A: Acceptance Code: 123 (001 0010 0011 bit)
Acceptance Mask: 7FF (111 1111 1111 bit)
(3) If users want to get the message of CAN ID from “100” to “13F” (Hex) and filter all the other
CAN message, the setting must be as follow:
In CAN 2.0A: Acceptance Code: 10X (001 00XX XXXX bit)
(X: don’t care)
Acceptance Mask: 7C0 (111 1100 0000 bit)
(4) The settings of CAN 2.0A and CAN 2.0B are the same. The different between CAN 2.0A and
CAN 2.0B is the CAN ID bits.
In CAN 2.0A: number of CAN ID bits is 11.
In CAN 2.0B: number of CAN ID bits is 29.
I-7530, I-7530-FT, I-7530A, I-7565, tM-7530, tM-7530A, tM-7565 User Manual Version 1.5
Page
：
67
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: [email protected]
