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8.4. "03 (0x03) Read Holding Registers" function
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:
Byte Meaning
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:
Byte Meaning
0
Function Code =
03h
1
Byte Count (B = 2 × No. of Points)
2
First Point Data Hi
3
First Point Data Lo
・・・
・・・・・・・・・・・・・・・・
B
Last Point Data Hi
B+1
Last Point Data Lo
Exception response format:
Byte Meaning
0
Function Code =
83h
1
Exception Code =
01 (Illegal Function)
02 (Illegal Data Address)
03 (Illegal Data Value)
Notes
If the communication number that doesn't exist is read, the option returns 0x8000.
Содержание EtherNet/IP Modbus IPE002Z
Страница 57: ...E6581741 56 Select the Module as below Select revision of drive Put in Name and IP address and press OK button ...
Страница 61: ...E6581741 60 Select the Download Once again select the Download ...
Страница 64: ...E6581741 63 ...
Страница 83: ...E6581741 82 13 3 Drive monitor Main menu Monitoring The state of the drive can be confirmed on this page ...
Страница 85: ...E6581741 84 Input the write value to popup window ...
Страница 89: ...E6581741 88 13 9 TCP IP statistics Main menu Diagnostics You can check TCP IP status on this page 88E ...