Using Modbus Rtu Command To Get A Specific Can Message - ICP DAS USA I-7530A-MR-G User Manual

6.2.3 Using Modbus RTU command to get a Specific CAN Message

The I-7530A-MR supports a "Specific CAN Message" field to get the expect
ten specific CAN messages(firmware v1.02 or later support 100 CAN ID of CAN
messages). When receiving a CAN message whose CAN ID is defined in the
Specific CAN Message by the Utility tool, the I-7530A-MR will save this CAN
message to the "Specific CAN Message" field.
Users can use the Modbus RTU command (function code 04
read the CAN message from this field. It is usually used to get the important
CAN messages immediately. The start address of the command must be the
same as the start address defined in the Specific CAN Message field, and the
data length field must be a multiple of 9.
Example:
Use the Modbus RTU command (function code 04
message from the "Specific CAN Message" field:
Figure 6-7: Use the Modbus command to read specific CAN message.
I-7530A-MR Modbus RTU to CAN Converter User's Manual (Version 1.08, 07/2019) ------------- 86
hex
) to read the specific CAN
hex
) to directly