ICP DAS USA I-7530A-MR-G User Manual page 100

 CAN Specification:
This field indicates this CAN message uses CAN 2.0A or CAN 2.0B. If
the CAN 2.0A is selected, the maximum value of CAN ID is 0x7FF.
Relatively, if the CAN 2.0B is selected, the maximum value of CAN ID
is 0x1FFFFFFF.
 CAN ID:
This field indicates the hexadecimal value of the CAN ID.
 Modbus Configuration:
The "Modbus Configuration" is used for setting Modbus Write Coil
/Registers commands. Before using this configuration, you must know
what is the Modbus Write Coil/Registers format that the Modbus slave
devices supported. After setting done, the I-7530A-MR will start to
access the Modbus slave devices when receiving a CAN data frame
with IO data.
Modbus write signal Coil/Registers format:
Node Function
ID Code
Modbus write multiple Coil/Registers format:
Node Function Start
ID Code Address
 Slave Node ID:
Set the Modbus slave ID which you want to access.
I-7530A-MR Modbus RTU to CAN Converter User's Manual (Version 1.08, 07/2019) ------------- 100
Start Start
Address Address
Start Bit/Word
Address Count
Bit/Word Bit/Word
Count Count
Bit/Word Byte
Count Count
CRC
...
IO CRC
...
Data
CRC
CRC