75
5
Response:
0x00020000000901: MBAP Header
0x03: Function code 3 ( ead Analog Output Holding Registers)
R
0x06: The number of data bytes to follow (6 bytes)
0x0A 0A 0A FF FF FF: means that the firmware version of the
MCU number1 is R01.0, R01.0 for the MCU number 2 and
R01.0 for the MCU number 3.
0x00020000000901
0x03
0x06
0x0A0A0AFFFFFF
Request:
Response:
5.3.6. Read Input Register
2
(FC=04)
The request message specifies the starting register and
quantity of registers to be read.
For example: Client requests the content of analog input
register 0x0201 (READ_VOUT from the PSU with
address 0) from the server
5.3.6. Write Single Register (FC=06)
3
The request message specifies the register reference to be
written.
For example: Client writes all PSU ON to analog output
holding register of 0x0000 (OPERATION)
0x00020000000601: MBAP Header
0x04: Function code 4 ( ead Analog Input Registers)
R
0x0201: The Data Address of the first register requested
0x0001: The total number of registers requested ( ead only 1
R
registers from 0x0201)
0x00020000000501: MBAP Header
0x04: Function code 4 ( ead Analog Input Register)
R
0x02: The number of data bytes to follow (2 bytes)
0x157C:
157C = 5500 =
16
10
The contents of register: 0x0201.
55.00V
0x00020000000601
0x00020000000501
0x04
0x04
0x0201
0x02
0x0001
0x157C
76
5
Request:
Request:
5.3.6. Write Multiple Register (FC=10)
4
The request message specifies the multi-register references to
be written.
For example: Client writes PSU#0-15 ON and the rest of
PSU#16-47 OFF to analog output holding register
of 0x0001~0x0003 (OPERATION(PSU#0~~47))
0x00020000000601: MBAP Header
0x06: Function code 6 (Preset Single Register)
0x0000: The Data Address of the register
0x0001: The value to write
Response:
The normal response is an echo of the query, returned after
the register contents have been written.
0x00020000000D01: MBAP Header
0x10: Function code 10 (Write Multiple Register)
0x0001: The Data Address of the first register
0x0003: The total number of registers (write 3 registers from
0x0001 to 0x0003)
0x03: The number of data bytes to follow (3 bytes)
0xFFFF: The value writes to 0x0001. Set all PSU#0-15 at logic
“ ”
1
(ON)
0x0000: The value writes to 0x0002. Set all PSU#16-35 at logic
“0” (OFF)
0x0000: The value writes to 0x0003. Set all PSU#36-47 at logic
“0” (OFF)
Response:
The normal response is an echo of the query, returned after
the register contents have been written.
0x00020000000601
0x00020000000D01
0x06
0x10 0x0001 0x0003 0x03 0xFFFF 0x0000 0x0000
0x0000
0x0001
5.3.6. Read Array Log (FC=64)
5
The request message specifies the starting register and
quantity of registers to be read.
For example: Client requests the content of analog output
holding registers 0x6000 (Event log#1) from the
server
