Feedback Fault When the Feedback alarms have occurred, this indicates that there is no valid position feedback. If there is a “single” position feedback device, this fault indicates that one or more feedback-related faults (Feedback 1 Open Fault, Feedback 1 Range Fault, Position 1 Range Fault, Excitation Fault) are true. If there are “two” position feedback devices, this fault indicates that there are feedback-related faults on Both feedback devices. Type (alarm or shutdown): configurable Latching/non-latching response: configurable
Feedback 1 Open Fault
This fault indicates that the SPC has detected an open wire in the position feedback 1 transducer circuit. Type (alarm or shutdown): configurable
Latching/non-latching response: configurable Feedback 2 Open Fault
This fault indicates that the SPC has detected an open wire in the position feedback 1 transducer circuit. Type (alarm or shutdown): alarm
Latching/non-latching response: configurable
Feedback 1 Range Fault
This fault indicates that the voltage on the LVDT/RVDT 1A or 1B inputs has exceeded the normal voltage range by the Feedback Range Threshold value. The normal voltage range is determined during calibration. For example, suppose that the voltage on the LVDT/RVDT 1A input changed from 2 volts to 6 volts during the calibration procedure, and Feedback Range Threshold is 0.3 V.
A Feedback 1 Range fault will occur if the voltage on the LVDT/RVDT 2A input is less than 1.7 V or greater than 6.3 V.
Type (alarm or shutdown): configurable Latching/non-latching response: configurable
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