Next: GMRT Receivers
Up: The GMRT Servo System
Previous: Digital Controller
Contents
The central control station sends commands to a group of antennas
via an optical fiber link (see Chapter 24). Some of the
operational commands, related to the servo is described next.
- COLDSTART: On receiving this command, the servo system removes
the stow-lock pins, releases the motor brakes, enables the servo
amplifiers, holds both the axes at the current angle and waits
for next command.
- MV arg1,arg2: Move along the azimuth and elevation axes to
the angles arg1 and arg2 respectively. The servo system releases
the motor and moves the antenna.
- TRACK arg1,arg2,arg3: Track in azimuth and elevation axes with
the destination angle as arg1 and arg2 and the time parameter
as arg3.
- HOLD: Holds both the axes. On receiving this command, servo system
releases brakes of both axes motors and holds the antenna in position.
- STOP: Stops both the axes. On receiving this command, servo system
disables amplifiers & applies brakes to both axes motors.
- CLOSE: Close the observations. On receiving this command, servo
system positions the elevation axis to 90:00:00 deg., disables all
amplifiers, applies brakes to all motors & inserts the
stow-lock pin.
- STOW: Inserts the stow-in pin in the elevation axis and locks the axis.
- SWRELE: Releases stow-in pin from the elevation axis and frees the axis.
- RSTSERVO: Resets the station servo computer.
Next: GMRT Receivers
Up: The GMRT Servo System
Previous: Digital Controller
Contents
NCRA-TIFR