0X03) Read Multiple Registers - ICP DAS USA PIR-130-AC User Manual

3.4 03 (0x03) Read Multiple Registers

This function code is used to read the values at addresses 3xxxx and 4xxxx.
Request
Byte Description
00 Address
01 Function Code
02 - 03 Starting Address
04 - 05 Number of
Addresses
Requested
*N = Number of addresses requested
Response
Byte Description
Address
00
Function Code
01
Byte Count
02
Value from the
03 -
Requested Address
*N = Number of addresses requested
Error Response
Byte Description
00 Address
01 Function Code
02 Exception Code
PIR-130-AC/DC User Manual Ver. 1.4.0, 2020/07/28
Length
Value
(in Bytes)
1 1 to 247
1 0x03
2 Refer to the Modbus Address Mapping
Table for details.
2 0x0001 to 0x0001 + *N
Length
Value
(in Bytes)
1 1 to 247
1 0x03
1 *N x 2
*N x 2 .
Length
Value
(in Bytes)
1 1 to 247
1 0x83
1 Refer to the Modbus standard for more
details.
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