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I-7540D-MTCP Series FAQ
Q1、How do I get CAN message from Normal CAN field of I-7540D-MTCP through Modbus
TCP? (2020/12/02,Evan) ............................................................................................................ 2
Q2、How do I get CAN message from Specific CAN field of I-7540D-MTCP through Modbus
TCP? (2020/12/02,Evan) ............................................................................................................ 2
ICP DAS Co., LTD
2
Q1、How do I get CAN message from Norma l CAN field of
I-7540D-MTCP through Modbus TCP?
A：First, connect to port 502 of I-7540D-MTCP. Then use function code 0x04 to read 7 or 9
words of the input register with address 0. If there are CAN messages in the buffer of Normal
CAN field, I-7540D-MTCP will return the message. Or it will return error code.
(2020/12/02,Evan)
(2020/12/02,Evan)
Q2、How do I get CAN message from Specific CAN field of
I-7540D-MTCP through Modbus TCP?
A：
1. First, configure those CAN ID which you want to get in the Modbus page of the utility.
Run utility and turn to Modbus page. Then input CAN ID to the text box and press the
‘Add’ button to add the ID to the right list. Finally, press ‘Save’ button to save the CAN
ID of the list to I-7540D-MTCP.
(2020/12/02,Evan)
ICP DAS Co., LTD
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2. Connect to port 502 of I-7540D-MTCP. Then use function code 0x04 to read 7 or 9
0x0E10 ~ 0x0E21
18
Specific CAN message #01
0x0E34 ~ 0x0E45
18
Specific CAN message #03
0x101A ~ 0x102C
18
Specific CAN message #30
words of the input register with the address in the following table. I-7540D-MTCP will
return the latest message with the CAN ID which is configured by utility.
Modbus address Words Description
0x0E22 ~ 0x0E33 18 Specific CAN message #02
… … …
Acceptance Code and Acceptance Mask are the functions of CAN hardware filter of I-7540D.
Users can use these two parameters to filter those unnecessary CAN messages. By setting
Acceptance Code, users can set the CAN ID they wan to get. Setting Acceptance Mask can
filter the unnecessary CAN ID. Please refer to the section 3.1.3 of the I-7540D user manual
for more information.
(2020/12/02,Evan)
ICP DAS Co., LTD
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