Filter
Top Products
8 - 15 8 - 15
MELSEC-Q
8 TROUBLESHOOTING
8.2 Troubleshooting
Check the programmable controller CPU for an error before starting the
troubleshooting of the network module and network.
If the RUN LED of the programmable controller CPU is off/flickering or the ERR. LED
is on, identify the error that has occurred in the programmable controller CPU, and take
corrective action.
(1) Check that the host has joined the network.
Start the troubleshooting of the host by monitoring the status of the host.
First, check whether or not the host has joined the network.
This is important because it is not possible to monitor the status of other stations
and to perform troubleshooting on other stations unless the host has joined the
network.
The troubleshooting flowchart shown below explains the sequence from checking
an error to enabling a baton pass (in order to join the network).
(a) For the master module