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Have a Simple Modbus Server
1.
Have a Simple
MODBUS Server StarNight @ HITCON 2019 Lighting Talk
2.
Who am I 潘建宏
/ Jian-Hong Pan (StarNight) You can find me at ~ http://www.slideshare.net/chienhungpan/ GitHub : starnight
3.
https://github.com/starnight/Modbus-Server
4.
Specifications ● MODBUS Application
Protocol Specification V1.1b3 ● MODBUS Messaging on TCP/IP Implementation Guide V1.0b
5.
Client Server PLC, Sensors ... PLC, HMI, PC
...
6.
MODBUS over Serial
(RS-232/485/422) Ref: MODBUS Application Protocol Specification V1.1b3
7.
Ref: MODBUS Application
Protocol Specification V1.1b3
8.
MODBUS over TCP/IP Ref:
MODBUS Messaging on TCP/IP Implementation Guide V1.0b
9.
MBAP Header Layout Ref:
MODBUS Messaging on TCP/IP Implementation Guide V1.0b
10.
Ref: MODBUS Application
Protocol Specification V1.1b3
11.
Function Code 01
(0x01) Read Coils for example *N= Quantity of Outputs / 8, if the remainder is different of 0 => N = N+1 Ref: MODBUS Application Protocol Specification V1.1b3
12.
Ref: MODBUS Application Protocol
Specification V1.1b3
13.
Demo
14.
MODBUS/TCP Security Protocol
Specification
Download now