Справочник Пользователя для Hamilton Sundstrand Company Fuel Metering Valves XVG

 

 

 

 

The slave’s response message is also constructed using Modbus protocol. It 
contains fields confirming the action taken, any data to be returned, and an error–
checking field.  

 

If an error occurred in receipt of the message, or if the slave is unable to perform 
the requested action, the slave will construct an error message and send it as its 
response. 

 
Request   

FUNCTION CODE + REQUEST DATA 

Response, no error 

FUNCTION CODE + RESPONSE DATA 
 

Response, with error  EXCEPTION FUNCTION CODE + REQUEST DATA  

where 

Table 2:  Modbus Transactions 

 

 

Each Modbus register in the XVG/eXVG is identified by its 4-digit number 
address. With XVG/eXVG, the term “register” refers to both Modbus Holding 
Registers (read-write) and Modbus Input registers (read-only). The types of 
XVG/eXVG Modbus registers are listed in Table 3. 

 

U16 16 

bit  Integer 

3000-

3999 

Unsigned 16-bit integers ranging 
from 0 to 65535. 

U32 16 

bit  Integer 

5000- 

6999 

Use in pairs to store unsigned 32-bit 
integers ranging from 0 to 
4294967295. 

Float 16 

bit 

Floating-point 

7000-

7999 

Use in pairs to store 32-bit floating-
points values in single-precision 
IEEE 754 format. 

ASCII 

16 bit 

8-bit ASCII 

3000-

3999 

One or more consecutive registers.  
Each register stores two 8-bit ASCII 
characters (16 bits total). 

Table 3:  Modbus Transactions 

 
 
 

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