4. Troubleshooting (DeviceNet)
♦ Causes of Error
Possible Cause | Examination Method | Countermeasure |
{ Slave power OFF | Measure the power voltage of the | Supply power to the |
| slaves. (It should be within the range | slave. |
| of sufficient voltage for the slave |
|
| operation.) |
|
| NOTE: For slaves operating with |
|
| communications power |
|
| supply, measure voltage at |
|
| the DeviceNet connector. |
|
{ Broken unit | Slave unit replacement | Replace the broken |
|
| slave unit with a new |
|
| one. |
4.1.2.1.2 Slave: Communication Error Detection / Busoff Detection /
| MS | NS | |
Master LED Condition | Green Light ON | Red Light Blinking | |
(1) Absent Slave LED Condition | Green Light ON | Red Light Blinking | |
(Communication error detection) | |||
|
| ||
(2) Absent Slave LED Condition | Green Light ON | Red Light ON | |
(Busoff detection) | |||
|
| ||
(3) Absent Slave LED Condition | Green Light ON | Light OFF | |
(Slave not added to the network) | |||
|
|
Fieldbus I/O Rev.6 | 83 |
