ECD TC80, Инструкция по эксплуатации, Страница: 46 / 53

Page 45 Model TC80
CRC 2 Bytes calculated
*N = Quantity of Registers
Error
Modbus ID (Slave Address) 1 Byte 1 to 247 (0x01 to 0xF7)
Error Code 1 Byte 0x86
Exception Code 1 Byte 01, 02, 03 or 04
CRC 2 Bytes calculated
06 (0
X
06) W
RITE
S
INGLE
R
EGISTER
This function code is used to write a single holding register in a remote device.
The Request Protocol Data Unit specifies the address of the register to be written. Registers are addressed
starting at zero. Therefore register number 1 is addressed as 0.
The normal response is an echo of the request, returned after the register contents have been written.
Request
Modbus ID (Slave Address) 1 Byte 1 to 247 (0x01 to 0xF7)
Function code 1 Byte 0x06
Register Address 2 Bytes 0x0000 to 0xFFFF
Register Value 2 Bytes 0x0000 to 0xFFFF
CRC 2 Bytes calculated
Response
Modbus ID (Slave Address) 1 Byte 1 to 247 (0x01 to 0xF7)
Function code 1 Byte 0x06
Register Address 2 Bytes 0x0000 to 0xFFFF
Register Value 2 Bytes 0x0000 to 0xFFFF
CRC 2 Bytes calculated
*N = Quantity of Registers
Error
Modbus ID (Slave Address) 1 Byte 1 to 247 (0x01 to 0xF7)
Error Code 1 Byte 0x86
Exception Code 1 Byte 01, 02, 03 or 04
CRC 2 Bytes calculated
R
EGISTERS
Per the Modbus Application Protocol Specification (V1.1b)
Name Meaning (2 bytes each register) Number
of
Registers Return
Data
Format Read
Write Requires
Storage
Initiate Register #
dec
hex
Modbus ID (slave address)
Defined as 1 to 247 per the Modbus Application
Protocol Specification (V1.1b)
1
16 bit
Integer
RW 0 00
Data Format
Data Format of the User Bus to the T80 (0-DF8N2, 1-
DF8O1, 2-DF8E1, 3-DF8N1)
1
16 bit
Integer
RW 1 01
Baud Rate
Baud Rate of the User Bus to the T80 (0-1200, 1-
2400, 2-4800, 3-9600)
1
16 bit
Integer
RW 2 02
BusMessage
total message count detected by the slave (remote
device)
1
16 bit
Integer
R 3 03
BusCommunicationsError total CRC error count 1
16 bit
Integer
R 4 04