LSIS eXP Series, eXP20-TTA - Serial Communication Diagnosis

Chapter 5 Diagnostics
5-7
5.6 Serial Communication Diagnosis
If you press [Serial] button, you can diagnose Serial ports which is equipped at XGT Panel.
(In case of diagnosis purpose, you have to connect the loop-back terminal at each port.)
[Serial port selection]
[Completion of serial port diagnosis]