Card reader abnormal cause search 1 confirm whether the card reader is normal
1. Test the abnormal card reader and the normal card reader;
2. Take the card reader to the controller for close-range testing.
2 check the card reader installation environment
1. Confirm that the card reader is installed back to back (the spacing needs to be greater than 30mm);
2. Confirm whether it is mounted on a metal surface;
3. Confirm whether there is interference from strong electromagnetic equipment (the card reader needs to be routed separately).
3 card reader power test
1. Confirm that the card reader is truly grounded;
2. The Power Supply stability of the card reader;
3, power supply stability (if you use UPS power supply, remove the test).
Precautions
1. Connect the card reader test separately, first confirm whether the card reader is normal;
2. The card reader needs to be shared with the controller when it is tested separately.
3, the normal card reader will be connected to the 485 communication board, then the calibration time can be;
4. The same card is swiped with two card numbers on the card reader, and the card is damaged by the composite card or the card reader.
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