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10.8 Converter Failure Alarm
If any one of the following errors occurs in a self-diagnosis sequence, the converter issues an alarm
using a contact output.
●Self-diagnosis errors
Self-diagnosis errors (LCD display) Error items
ROM error
RAM error
System parameter error
Excitation circuit not connected or open
Excitation current error, excitation circuit error
ADC error
Invalid totalizer counts
Note: A self-diagnosis error message appears on the Display 2 measured value screen. If this
happens, the measurement item specified on the Display 2 screen cannot be displayed
unless the error is removed. However, if OFF is set to 8.2.24
, “Self Diagnosis Function Setting,” an error does not appears even if an error occurs.
If you want to use a converter alarm output, set Digital Output 1 (DO1) or Digital Output 2
(DO2) for converter alarm output (CONV ALM) following 8.2.18, “Digital Output.”
In addition, set the alarm output condition to normally open (NormOPEN) or normally
closed (NormCLOSE) status.
●Contact output condition
NormOpen; In case an error occurs, contact is closed.
NormClose; In case an error occurs, contact is open.
Note: Alarm output contact is open when converter power is off.