ICP DAS USA I-7530A-MR-FD User Manual page 74

Modbus Output Register:
There are two fields on Modbus output register, one is TX CAN message
field and the other is Configuration command field. The addresses of these
fields are described below.
Table5-5(1): Modbus output register address
Protocol Address
(Base 0)
00000 ~ 00006
00256 ~ 00511
Table5-5(2): Modbus output register address
Protocol Address
(Base 0)
00000 ~ 00034
00256 ~ 00511
(1) TX CAN Message Field:
The "TX CAN Message" in the Modbus Output Register is used to store a
CAN message which will be transmitted to the CAN network.
The TX CAN Message formats are described below:
general CAN:
Word
number
1
2
3
4
5
I-7530A-MR-FD Modbus RTU to CAN Converter User's Manual (Version 1.0, 08/2022) ------------- 74
PLC Address
(4x Base 1)
Decimal rule
00001 ~ 00007
00257 ~ 00512
PLC Address
(4x Base 1)
Decimal rule
00001 ~ 00035
00257 ~ 00512
Bit 6~15: Reserved
Bit 5: CAN Specification, 0CAN 2.0A, 1CAN 2.0B
Bit 4: RTR, 0No, 1Yes
Bit 0~3: Data length, value = 0~8
Most significant two bytes of CAN Identifier. (Big
endian)
Least significant two bytes of CAN Identifier. (Big
endian)
The data 1 and data 2 of CAN data field.
The data 3 and data 4 of CAN data field.
Description
TX CAN Message
Configuration command
Description
TX CAN Message
Configuration command
Description
( general CAN)
(CAN FD)