ICP DAS USA I-7530A-MR User Manual

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ICP DAS USA I-7530A-MR User Manual Manual pdf 86 page image

I-7530A-MR Modbus RTU to CAN Converter User’s Manual (Version 1.07, 06/2016) ------------- 865.2.3 Using Modbus RTU command to get a Specific CAN MessageThe I-7530A-MR supports a “Specific CAN Message” field to get the expectten specific CAN messages(firmware v1.02 or later support 100 CAN ID of CANmessages). When receiving a CAN message whose CAN ID is defined in theSpecific CAN Message by the Utility tool, the I-7530A-MR will save this CANmessage to the “Specific CAN Message” field.Users can use the Modbus RTU command (function code 04hex) to directlyread the CAN message from this field. It is usually used to get the importantCAN messages immediately. The start address of the command must be thesame as the start address defined in the Specific CAN Message field, and thedata length field must be a multiple of 9.Example:Use the Modbus RTU command (function code 04 hex) to read the specific CANmessage from the “Specific CAN Message” field:Figure 5-7: Use the Modbus command to read specific CAN message.