03 (0X03) Read Holding Registers" Function - Toshiba TOSVERT VF-S15 Manual

8.4. "03 (0x03) Read Holding Registers" function

This Modbus request is used to read a value continuously from contiguous inverter parameters.
Communication number of inverter parameter is set in hexadecimal. However, in the case of continuous
reading, communication number is rounded up at 0xA. For example, if you read inverter parameter
continuously from the parameter f109 (Communication No. is 0x0109), the next reading parameter is
f110 (Communication No. is 0x0110).
Request Format:
Byte
0 Function Code = 03h
1 Communication No. of Starting Parameter Hi
2 Communication No. of Starting Parameter Lo
3 Number of Parameters Hi (0)
4 Number of Parameters Lo (1 - 125)
Response format:
Byte
0 Function Code = 03h
1 Byte Count (B = 2 × Number of Points)
2 First Parameter Data Hi
3 First Parameter Data Lo
･･･ ････････････････
B Last Parameter Data Hi
B+1 Last Parameter Data Lo
Exception response format:
Byte
0 Function Code = 83h
Exception Code
01: Illegal Function
1
02: Illegal Data Address
03: Illegal Data Value
If the communication number that doesn't exist is read, This product returns 0x8000.
Meaning
Meaning
Meaning
Notes
- 60 -
E6582051