Toshiba lf546 User Manual

 
 

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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 

ROM error 

RAM ERROR 

RAM error 

PARAMETER 
    FAILURE 

System parameter error 

EXC CUR 

       OPEN 

Excitation circuit not connected or open 

EXC CUR 

      ERROR 

Excitation current error, excitation circuit error 

ADC ERROR 

ADC error 

INVALID 

      TOTAL 

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.