4. Troubleshooting (DeviceNet)
4.1.2.3 Master: Unestablished Communication
| Master Unit LED |
| Error | Description | |
| MS | NS |
| ||
|
|
|
| ||
| Green | Light |
| Master | Communications power supply OFF |
| Light ON | OFF |
| Unestablished | No slave |
|
|
|
| communication |
|
♦ Process Flowchart |
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| |
Check |
| 6 |
|
| |
|
|
|
|
| |
No Problem
No Problem
No Problem
No Problem
Measure voltage of
communications power supply
at the master unit.
No problem
Check the following:
-Unconnected terminating resistor
-Unconnected or loose connector/signal wire
-Cable disconnection
No problem
Check that power is supplied to all slaves.
No problem
Check for master unit configuration.
Problem exists. (Fix it.)
Problem exists. (Fix it.)
See 4.1.3.1 and 4.1.3.2.
Problem exists. (Fix it.)
Problem exists. (Fix it.)
No problem
Finish
Replace the master unit.
Fieldbus I/O Rev.6 | 89 |
