Toshiba IPE002Z 用户手册

 

E6581741 

- 65 - 

The Modbus request is used to read the values of a number (No. of Points) of adjacent 
words starting at the address indicated (Starting Address). The values read are restored 
one after another, at the end of the response (First Point Data -> Last Point Data). 
 
 
Request Format: 

0 

Function Code = 03h 

1 

Starting Address Hi 

2 

Starting Address Lo 

3 

No. of Points Hi (0) 

4 

No. of Points Lo (1 - 125) 

 
Response format: 

0 

Function Code = 03h 

1 

Byte Count (B = 2 × No. of Points) 

2 

First Point Data Hi 

3 

First Point Data Lo 

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B 

Last Point Data Hi 

B+1 

Last Point Data Lo 

 
Exception response format: 

0 

Function Code = 83h 

1 

Exception Code =   
01 (Illegal Function) 
02 (Illegal Data Address) 
03 (Illegal Data Value)

 

 
 

 

   If the communication number that doesn't exist is read, the option returns 0x8000.