SHM-B ASYNC
Pins 4, 5, 6, 8, and 20 should all be HIGH to enable communication.
5.If pin 8 (Carrier Detect) is low, this indicates:
•a defective transmission line or connection
•a defective remote
•remote
SYMPTOM: TD and RD LEDs indicate data activity, but data communication doesn’t exist.
1.Check the wiring of the
2.Check the setting of S1. Refer to Section 3.3 for information.
SYMPTOM: Transmitted and/or received data is full of errors (garbled data).
1.Check for reversal of polarity on the
2.Check word structure and speed settings on your
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