PIR-130-AC/DC User Manual
Ver. 1.4.0, 2020/07/28
81/93
3.4
03 (0x03) Read Multiple Registers
This function code is used to read the values at addresses 3xxxx and 4xxxx.
Request
Byte
Description
Length
(in Bytes)
Value
00
Address
1
1 to 247
01
Function Code
1
0x03
02 - 03
Starting Address
2
Refer to the Modbus Address Mapping
Table for details.
04 - 05
Number of
Addresses
Requested
2
0x0001 to *N
*N = Number of addresses requested
Response
Byte
Description
Length
(in Bytes)
Value
00
Address
1
1 to 247
01
Function Code
1
0x03
02
Byte Count
1
*N x 2
03 -
Value from the
Requested Address
*N x 2
.
*N = Number of addresses requested
Error Response
Byte
Description
Length
(in Bytes)
Value
00
Address
1
1 to 247
01
Function Code
1
0x83
02
Exception Code
1
Refer to the Modbus standard for more
details.