Table of Contents
Advertisement
5.2.1 Using Modbus RTU command to get a CAN Message
When the I-7530A-MR is set to the Modbus Slave mode, each CAN
message (except the CAN message whose CAN IDs are defined in the Specific
CAN Message field) received from the CAN network will be stored into the
"Normal CAN Message" field. Users can use the Modbus RTU command
) to read the CAN message from the "Normal CAN
(function code 04
hex
Message" field (refer to table 5-2.). The start address of each command must
be set to 0000
and the data length field must be a multiple of 9 because one
hex
CAN message uses 9 address space. After reading the registers by the Modbus
command, the content of the registers of the read CAN message is covered by
the unread CAN message which will be read next.
Example1:
Use Modbus RTU command (function code 04
) to read one CAN message:
hex
Figure 5-3: Use the Modbus command to read one CAN message.
I-7530A-MR Modbus RTU to CAN Converter User's Manual (Version 1.07, 06/2016) ------------- 79
Advertisement
Table of Contents
