Specifications

Doc Number: VIS-ANA-VER-01001-9002
Date: 27 May 2004
Issue: 5.0
Page: 57 of 80
Author: J. Delgadillo
Controls Preliminary Design Report Issue 5.doc
AXIS FUNCTION NAME
Divergence Lim
Cass-CableWrap Negative
Divergence Lim
AZ/CASS CableWrap Sector Azimuth CableWrap
Cass CableWrap
AZ/ALT/CASS Stow Pin Stowed
Stow Pin Engaged
(AD01 11.1.9 spec)
AZ Lube Pump Pressure Low
Overflow
(AD01 9.2.1 g spec)
ALT Imbalance M2 Unit Not Installed
CASS Instrument Not Installed
OSS Not Installed
ALT Imbalance Pin Cradle
ALT Manual Brake Release
AZ/ALT Mount Parked AZ Mount Parked
ALT Mount Parked
(AD01 13.4.12 spec)
ALT Aux Drive Intlk ALT Aux Drive On Intlk
AZ/ALT/CASS Emergency Stop AZ Motor 1-2 E-stop
AZ Motor 3-4 E-stop
ALT Motor 1 E-stop
ALT Motor 2 E-stop
ALT Pier E-stop
Equipment Room E-stop
Cone E-stop
AZ AZ Interlock Yoke Access Hatch Intlk #1
Yoke Access Hatch Intlk #2
Pier Access Interlock
Mobile Access Platform Intlk
ALT ALT Interlock M1 Restraint Failure
Mobile Access Platform Intlk
AZ Floor Access Interlock
There will be three (3) levels of over-travel protection in hardware for each axis. The levels
of protection are: Pos/Neg Vicinity Limit, Pos/Neg Pre-Interlock Limit and Pos/Neg
Interlock (lanyard/buffer) Limit. Upon the activation of the Limits, the following will occur:
Vicinity Limit: Fault is reported to the MCU and LCU-fed contacts open. Axis motors
remain active and axis automatically backs-out of the limit condition.