Abstract
The upgrade of the Aladdin control system included many enhancements in the software. Some of the new diagnostic aids provided are: • - intelligent temporary logging of all readbacks for at least the previous 12 hours, • - permanent logging of specified readbacks into disk files, • - temporary logging of beam positions at an operator-specified interval, • - an alarm system for all devices, including range limits for analogue readbacks that should remain fixed and window limits which automatically track readbacks that should decay or increase monotonically, • - automated checklists to verify that devices are within the specified operating range for a particular phase of operation, • - latched digital signals to capture momentary changes. The software has been designed to alert the operator when something is wrong, without generating a flood of unimportant messages, and to make it possible to observe and record readbacks over a range of time scales. The latter capability is essential for tracking down marginal components and correlating observed problems with possible causes. The algorithms used for these diagnostic aids, and how well they perform their desired tasks, are described in this paper.
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