User guide

Chapter 5
Setup and Configuration
RUGGEDCOM ROS
User Guide
114 Raw Socket Character Encapsulation
• Section 5.4.1.1, “Raw Socket Character Encapsulation”
• Section 5.4.1.2, “RTU Polling”
• Section 5.4.1.3, “Broadcast RTU Polling”
• Section 5.4.1.4, “Preemptive Raw Socket”
• Section 5.4.1.5, “Port Redirectors”
• Section 5.4.1.6, “Message Packetization”
Section 5.4.1.1
Raw Socket Character Encapsulation
Character encapsulation is used any time a stream of characters must be reliably transported across a network.
Character streams can be created by any type of device. The baud rates supported at either server need not be
the same. If configured, the server will obey XON/XOFF flow control from the end devices.
1
1 3
2
2
Figure 75: Character Encapsulation
1. Server 2. RMC30 3. Ethernet
Section 5.4.1.2
RTU Polling
Remote Terminal Unit (RTU) polling applies to a variety of RTU protocols, including Modbus ASCII and DNP.
NOTE
If a given device or service employs a serial protocol that is supported by ROS , it is advised to
configure ROS to use that particular protocol, rather than another one (e.g. RawSocket) that can be
made to be (partly) compatible.
Host equipment may connect directly to a server via a serial port, may use a port redirection package, or may
connect natively to the (Ethernet/IP) network.