| 摘要 |
A device for monitoring equipment failures within a process plant. The device determines the following condition of a two-state contact (1) Normal; (2) Off-normal due to an abnormal condition; and (3) Off-normal due to a normal condition and functions to alert a plant operator or automatically initiate a corrective action whenever a device, piece of equipment or an electrical motor has abnormally stopped or failed to complete a commanded operation without being operator initiated or initiated by some other normal function.
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