10 TROUBLESHOOTING
10.3.1 Troubleshooting when "RUN" LED is turned OFF
Symptom |
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| Corrective action | MC |
| • | A transmission setting | • | Set the switch by GX Developer correctly and |
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| switch is set to an |
| after writing to the CPU reset the CPU. |
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| unusable position. |
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| • Remove the cause of the CPU error and reset |
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| the CPU. |
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| • PLC CPU error. |
| Note |
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| • During the Q series C24 and external device |
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| loopback test, the minimum parameters file |
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| must be written to the CPU beforehand. |
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• The Q series C24 |
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| • | Calculate the 5 V current drain of each installed |
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| module. If the current capacity is insufficient, |
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"RUN" LED turned off. |
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| check power module selection. |
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| • Power module 5 V |
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| current capacity is |
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| • Whether or not the current capacity is |
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| insufficient. |
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| insufficient can be checked by disconnecting |
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| the expansion base and installing only the Q |
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| series C24 to the basic base. |
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| • | Extraneous noise | • | Check if the shield wire is |
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| caused the Q series | • When ground is used with other devices, |
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| C24 to abnormal |
| ground the Q series C24 independently. |
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| operation. |
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Bidirectional Non procedure
10 - 29 | 10 - 29 |