10 TROUBLESHOOTING
10.3.2Troubleshooting when "RD" LED does not blink even though an external device is transmitting a message
Symptom |
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| Corrective action | MC |
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| • Check if the Q series C24 and external RD and |
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| • | Signal lines are not |
| SD signal lines are cross connected. |
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| • Use the external device OPEN statement to |
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| connected correctly. |
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| check if the opened port and the cable |
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| connection port are matched. |
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| • Connect the wiring so that the "DSR", "CS", and |
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• "RD" does not blink | • | External device |
| other transmission control signals are ready. |
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| transmission control |
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even through an |
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| signals are not turned |
| • Since the control signal specifications depend |
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external device is |
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| ON. |
| on the device, connect the wiring by seeing |
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transmitting a message. |
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| the instruction manual of the device used. |
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| • If the message passes |
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| through an |
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| • Check the specifications of the converter and |
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| modem, etc., the signal |
| modem and recheck the settings and wiring |
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| is interrupted at one of |
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| the intervening devices. |
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Bidirectional Non procedure
10 - 30 | 10 - 30 |