In this paper we describe an Internet accessible robot control laboratory, providing remote trajectory planning and execution for a SCARA robot. The laboratory provides students with hands-on experimental experience with a robotic manipulator. The system is based on client-server TCP/IP architecture. The server-side system, running on an Ultimodule embedded platform, controls the 4DOF SCARA robot motion. A PC-based client application enables users to plan trajectories and download them to the motion controller. Trajectory execution can be observed in parallel on a virtual robot model and a camera video stream capturing robot motion.

In the paper safety analysis of interface between electronic type of automatic level crossing device (LC) and relay based device of automatic block system (AB) is conducted for the purpose of indentifying the influence of their joint work on traffic safety. The analysis encompasses all potential failure cases in communication between observed signal-safety devices of AB and LC. Based on the results of the analysis it has been proved that the observed interface meets the safety criteria for application in railway transport, because if any failure occurs the respective signal-safety devices will always shift to a higher level of traffic safety, which is why it is not compromised.