Instructions

Message Types

15 (26)

Parameter

Description

port

CAN port number 1...2 (with NT 200), 1...4 (with NT 420)

type

Message format type: STD or EXT

identifier Value for the identifier to match (in HEX)

mask Value for the mask (in HEX)

Example

CAN 1 FILTER ADD STD 100 700

Return Value

Return value Description

R ok

Function succeeded

R ERR <error-number> <error-description>

See List of Error Codes, p. 24

Example for 11 bit Identifiers

hex bin

Identifier

0x100 0001:0000:0000

Mask

0x700 0111:0000:0000

Result 0x1XX (0x100–0x1FF)

0001:XXXX:XXXX

Any identifier between 0x100 and 0x1FF passes the filter, as only the first 3 bits of the mask are

marked as relevant.

Example for 29 bit Identifiers

hex bin

Identifier

0x10003344 0001:0000:0000:0000:0011:0011:0100:0100

Mask

0x1F00FFFF 0001:1111:0000:0000:1111:1111:1111:1111

Result

0x1FXXFFFF 0001:0000:XXXX:XXXX:0011:0011:0100:0100

Any identifier between 0x10003344 and 0x10FF3344 passes the filter.

Further Examples

Identifier Mask Valid message identifiers which pass the filter

0x100 0x7FF 0x100

0x700 0x700 0x700–0x7FF

0x000 0x000 0x000–0x7FF

Remark

To allow all messages to pass the filter, add CAN <port> FILTER ADD STD 0 0 and CAN

<port> FILTER ADD EXT 0 0 to the message filter list.

CAN@net NT 200/420 Software Design Guide

4.02.0332.20000 1.5 en-US