Siemens SITRANS FC410, Руководство по эксплуатации, Страница: 124 / 160

Modbus holding registers
A.3 Modbus holding registers tables
FC410 with Modbus
122
Operating Instructions, 02/2016, A5E33120874-AC
Response
Slave address 1 byte
Function 1 byte
Sub-function Hi 1 byte
Sub-function Lo 1 byte
Data Hi 1 byte
Data Lo 1 byte
: :
Data Hi 1 byte
Data Lo 1 byte
CRC 2 bytes
Example: Read Return Slave Message Count (address 529)
Query: 1,8,0,14,0,0,129,200
Slave address = 1 (0x01)
Function = 8 (0x08)
Sub-function Hi, Lo = 0, 14 (0x00,0x0E)
Data Hi, Lo = 0, 0 (0x00,0x00)
CRC = 129,200 (0x81, 0xC8)
Sub-function 0x000E = 14 = Read Return Slave Message Count
Response: 1,8,0,14,0,97,64,32
Slave address = 1 (0x01)
Function = 8 (0x08)
Sub-function Hi, Lo = 0, 14 (0x00,0x0E)
Data Hi, Lo = 0, 97 (0x00,0x65)
CRC = 64,32 (0x41, 0xE3)
Read Return Slave Message Count = 0x0065 = 97 message received
A.3 Modbus holding registers tables
In the following the Modbus RTU holding registers available for FC410 are described.
Note
All Write parameters require password access.