WEB, the Wind Evaluation Breadboard, is an Extremely Large Telescope Primary Mirror simulator, developed with the
aim of quantifying the ability of a segmented primary mirror to cope with wind disturbances. This instrument supported
by the European Community (Framework Programme 6, ELT Design Study), is developed by ESO, IAC, MEDIA-ALTRAN,
JUPASA and FOGALE. The WEB is a bench of about 20 tons and 7 meter diameter emulating a segmented
primary mirror and its cell, with 7 hexagonal segments simulators, including electromechanical support systems.
In this paper we present the WEB central control electronics and the software development which has to interface with:
position actuators, auxiliary slave actuators, edge sensors, azimuth ring, elevation actuator, meteorological station and air
balloons enclosure. The set of subsystems to control is a reduced version of a real telescope segmented primary mirror
control system with high real time performance but emphasizing on development time efficiency and flexibility, because
WEB is a test bench. The paper includes a detailed description of hardware and software, paying special attention to real
The Hardware is composed of three computers and the Software architecture has been divided in three
intercommunicated applications and they have been implemented using Labview over Windows XP and Pharlap ETS
real time operating system. The edge sensors and position actuators close loop has a sampling and commanding
frequency of 1KHz.