Serial Protocols
ROS™ v3.5 62 RS400
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.