Software Interface
The actual (software) interface between both applications (computers) is made via the
UDP/IP protocol. To establish a connection between the two computers the IP protocol uses an ARP (Address Resolution Protocol) algorithm at startup to determine the IP address of the other side.
The ARP algorithm is described in RFC826, the IP algorithm is described in RFC 791, the UDP algorithm in RFC768. The RFC's are easily available on the Internet. The layout of the data frames is described in the next paragraphs.
By default the Motion Computer has IP address 192.168.90.240. The Motion Computer by
default receives on UDP-port 16385 (0x4001) from any UDP-port and transmits from UDPport 16385 (0x4001) to the customer UDP-port as shown below.