The display shows an incorrect error code

Incorrect error code on seven segment display

Summary

The seven segment display shows an incorrect error code.

Cause 

• Interface defective
• Outputs on card A109 defective
• Problems with the wiring

Remedy

The following test can be used to verify that the A109 output board is working properly. Follow the error up to the seven-segment display.

1.  Generate a known error.
2.  Check the outputs on card A109. A40 to A45. 
   • A40 to A42 correspond to the first digit on the dsiplay.
   • A43 to A45 correspond to the second digit on the display.
3.  Define the error number using the table below.
   

• Example of error 70 (emergency stop)  
• Example of error 56