IME IF2E011, Руководство пользователя

Страница: 18 / 28

2
Working mode
The interface may work in the following configurations :
1) “Bridge” (Tunnelling)
2) “Bridge” with ModBus Over TCP protocol
3) “Web”
“Bridge” is also called “Cable wired” and it means the message is carried
without any variation
Bridge
See the following example of a request message to node 1 at address
0x1000 for both Modbus RTU
Node
Address
Function
code
Register
Hi
Register
Lo
Length
Hi
Length
Lo
CRC16
Lo
CRC16
Hi
01 03 10 00 00 02 C0 CB
Modbus Over TCP
Incremental
number
hi
Incremental
number
Lo
Protocol
type
Protocol
type
Byte
number
Hi
Byte
number
Lo
Indirizzo
Nodo
Functio
n code
Register
Hi
Register
Lo
Length
Hi
Length
Lo
00 01 00 00 00 06 01 03 10 00 00 02
Both frames are carried without any modification.