Function Code; Exception-Function Code; Memory Sign - Tripp-Lite S3M25-100kVA Manual Del Propietário

2. MODBUS Protocol Description

2.5 Function Code

The function code is used in the protocol.
No.
1
2
3
4
5
6
7
8
9
10

2.5.1 Exception-Function Code

Code
01H
02H
03H
06H
08H

2.5.2 Memory Sign

The protocol for grouping the memory: 0XXXX, 1XXXX, 2XXXX, 3XXXX and 4XXXX. Rules are in the following table:
Memory Sign
0XXXX Output Status
1XXXX Input Status
2XXXX Output Registers
3XXXX Input Registers
4XXXX Holding Registers
Code
01H
02H
03H
04H
05H
06H
0FH
10H
14H
2BH
Table 2.5.1 Exception-Function Code
Illegal Data Address
Replica Device Busy
Memory Parity Error
Table 2.5.2 Rule of Grouping the Memory
Name Type
Bit
Bit
Word
Word
Word
Table 2.5 Code
Definition
Read Coils
Read Discrete Inputs
Read Holding Registers
Read Input Register
Write Single Coil
Write Single Register
Write Multiple Coils
Write Multiple Registers
Read File Record
Read Device Identification
Definition
Illegal Function
Illegal Data Value
Read/Write
Read/Write
Read-Only
Write-Only
Read-Only
Read/Write
7
Remark
Remark
The function of request is wrong
The address of request is wrong
Wrong value is requested
Memory Address Function Code
00001 ~ 0XXXX 01H, 05H, 0FH
10001 ~ 1XXXX
20001 ~ 2XXXX 06H,10H
30001 ~ 3XXXX
40001 ~ 4XXXX 03H, 06H, 10H
02H
04H