361
Description Internal Runtime error - Sequencer frame state timeout out-of-bounds (±15%)
Possible Cause Possible hardware malfunction. Sequencer frame state timeout greater than ±15% of nominal. Alarm
occurs following a sequencer frame state timeout being out-of-bounds three frames in row; after five, controller put in
FAILURE control state.
Solution
• Ignore alarm if it occurs during a restart of the controller.
• Replace the controller, if the alarm occurs during normal operation.
362
Description Internal Runtime error - Sequencer frame number skip detected
Possible Cause Possible hardware or IONet malfunction. Frame number skips detected. Frame number should
monotonically increase until rollover; alarm occurs following three skips in a row, after five, controller put in FAILURE
control state.
Solution
• Ignore this alarm if it occurs during a restart of the controller.
During normal operation:
• Check for hardware or network switch malfunction.
• Check for loose or defective network cables.
• Replace the controller.
363
Description Memory Validation failed - Sequencer data structures
Possible Cause Hardware memory failure. Sequencer process data was modified (data should not change after the
controller is online).
Solution Replace the controller.
364
Description Too many state voter disagreements detected
Possible Cause
• State exchange voter disagreement overflow. System exceeded the limit of 128 simultaneous disagreements at once.
• Application error
• Hardware problem or IONet malfunction
Solution
• Use the ToolboxST disagreement display (View | Disagreements) to determine which variables are in disagreement.
• In the application, avoid use of global variable 'ControllerID' and avoid the use of 'USB_HB' block.
• Check IONet (switches, cables).
• If problem persists, replace the controller.
Controllers GEH-6855_Vol_II System Guide 57
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