4. Troubleshooting (DeviceNet)
♦Process Flowchart
Check | 7 |
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| Check for master unit | The problem is fixed. |
No Problem |
| configuration (scan list configuration). |
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| |
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| No problem |
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|
| Check the following: |
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| - Unconnected terminating resistor | Problem exists. (Fix it.) |
No Problem |
| - Unconnected or loose connector/signal wire | See 4.1.3.1 and 4.1.3.2. |
|
| - Cable disconnection | |
|
| No problem |
|
|
| Measure voltage of | Problem exists. (Fix it.) |
No Problem |
| communications power supply. |
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|
| No problem |
|
No Change |
| Replace moving cable | The problem is fixed. |
|
| (Replace deteriorated cable). |
|
|
| No change |
|
No Change |
| Check for noise influence. | The problem is fixed. |
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| |
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| See 4.1.3.3. |
|
| No change |
|
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| Replace the master unit. | The problem is fixed. |
No Change |
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| |
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| |
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| No change |
|
The trouble unit is not found. |
| ||
| Rarely | Does an error occur immediately? |
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| |
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| Immediately |
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| Divide the network and | The unit is found. |
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| find the trouble unit. |
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| The unit is not found. | Replace the unit. |
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| Yes |
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| Normal Communication? |
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|
| No |
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| Analyze the network with NetMeter. |
|
|
| Consult the DeviceNet manufacturer. | Finish |
92 |
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| Fieldbus I/O Rev.6 |
