Rtelligent EP Series - Appendix; 5.1. Appendix A Function Code Message Format; 5.1.1. Function 03: Read Holding Registers

EP Series User Manual
63
5. Appendix
5.1. Appendix A Function code message format
MBAP
Transaction Identifier
Protocol Identifier
Length
Unit Identifier
Function Code
Data
5.1.1. Function 03: Read Holding Registers
Query message:
97 76 00 00 00 06 04 03 00 7D 00 7D
Example
Length
Description
Remark
Map
message
header
0x97
1
Transaction Identifier, H
Client initiated, server replicated, for
transaction pairing
0x96
1
Transaction Identifier, L
0x0000
2
Protocol Identifier
Client initiates, server replicates
Modbus protocol = 0.
0x0006
2
Length
From the next to the last of this byte
0x04
1
Unit Identifier
Initiated by the client, the server
replicates the ID of the remote terminal
on the serial link or other bus
Function
code
0x03
1
Function Code, read
register
Data
0x007D
2
Start address
0x007D
2
Number of registers
Response message:
97 76 00 00 00 FD 04 03 FA AB 9E 41 18 7A E1 3F 94 7A E1 3F 94 0A 3D 3F 97 51 EC 3F 98 CC CD
C0 6C 33 33 C0 E3 CC CD C0 EC EB 85 41 F1 D7 0A 41 E9 47 AE 41 ED EB 85 41 F1 19 9A 43 D0
E6 66 43 C9 4C CD 43 CF EB 85 41 F3 66 66 42 0F CC CD 41 C2 E6 66 44 0A 1E B8 41 FB A3 D7
42 0C CC CD 41 BC C0 00 44 0A B8 52 41 F6 5C 29 42 0F 47 AE 41 D1 C6 66 44 0A 00 00 00 00 C9
9E FF 7F C9 9E FF 7F C9 9E FF 7F C9 9E FF 7F C9 9E FF 7F C9 9E FF 7F C9 9E FF 7F C9 9E FF
7F C9 9E FF 7F 05 16 00 00 04 11 00 00 05 16 00 00 04 11 00 00 05 16 00 00 04 11 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0A 00 0A
00 0A 00 0A 00 04 00 04 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 0F