I-7530A-MR Modbus RTU to CAN
Converter User’s Manual (Version 1.07, 06/2016) ------------- 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
ID
Function
Code
Start
Address
Start
Address
Bit/Word
Count
Bit/Word
Count
…
CRC
CRC
Modbus write
multiple
Coil/Registers format:
Node
ID
Function
Code
Start
Address
Start
Address
Bit/Word
Count
Bit/Word
Count
Byte
Count
IO
Data
…
CRC
CRC
Slave Node ID:
Set the Modbus slave ID which you want to access.