4. Troubleshooting (DeviceNet)
4.1.2.6 Uninitialized Network
Master Unit LED
MS | NS |
Error
Description
Light OFF Light OFF Uninitialized network Absent slave
-Master unit
-No slave (Error detection before communication establishment)
-Communications power supply OFF
♦Process Flowchart
Check | 9 |
|
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.
Problem exists. (Fix it.)
Problem exists. (Fix it.)
See 4.1.3.1 and 4.1.3.2.
Problem exists. (Fix it.)
No problem
Problem exists. (Fix it.)
No Problem | Check for master unit configuration. |
No problem
Finish
Replace the master unit.
96 | Fieldbus I/O Rev.6 |
