RuggedCom RS400 manual DNP 3.0, Microlok, TIN and WIN Applications, Concept of Links

Serial Protocols

2.2.3 DNP 3.0, Microlok, TIN and WIN Applications

RuggedServer™ supports a variety of protocols that specify source and destination addresses. A destination address specifies which device should process the data, and the source address specifies which device sent the message. Having both destination and source addresses satisfies at least one requirement for peer-to-peer communication because the receiver knows where to direct response. Each device supporting one of these protocols must have a unique address within the collection of devices sending and receiving messages to and from each other.

Figure 36: Source/Destination Two Way Communication

Even if protocol can distinguish between server and client side, for RuggedServer™ there is no difference. Both sides need to know where destination device is. If message is received from the network, destination address must point to the serial port on receiving server. If message is received from the local serial port, destination address must point to the IP Address of the server where addressed device is connected.

2.2.3.1 Concept of Links

Communication link is established between two addresses where, remote address is the source address from the message received from IP network and destination address from the message received from local serial port, and the local address is the source address from the message received from the serial port ,or the destination address received from the local serial port. For each link, a statistics record will be available to the user, if link statistics collection is enabled in the protocol configuration.

ROS™ v3.5 62 RS400