Troubleshooting Using The Io Controller Indicators - Omron CJ1W-PNT21 Operation Manual

Troubleshooting using the IO Controller indicators

8-2

Troubleshooting using the IO Controller indicators

8-2-1 Determining Operating Status from the Indicators
8-2-2 Normal Operating Status
This section presents a number of easy to use procedures to troubleshoot
possible errors using the LED indicators on the front of the Unit (see figure
below).
The LEDs on the Communication Unit (1) have the following functions:
/i
LED Indicates the
MS PROFINET IO Controllers Module Status
NS PROFINET IO Controllers Network Status
COMM PROFINET IO Controllers Communication Status
100 PROFINET IO Controllers IO Data Exchange Status
The LED indicators can be used to determine the following categories of
errors:
• Normal operation
This is the normal startup procedure and operation of the PROFINET IO
Controller. Any other indication means the Unit is an abnormal state.
• Start-up errors
These include errors in the PLC CPU, as well as errors in the Unit, which
prevents the combination from starting up correctly.
• Operational errors
These include PLC errors, PLC Bus errors, and error log problems, all
during operations.
• Configuration problems
These include errors during or after downloading a new configuration as
well as errors in the configuration after startup.
• PROFINET IO errors
These include errors in the PROFINET IO interface or on the network.
The following table shows the status of the MS, NS, COMM and 100M
indicators and the 7-segment display during normal operation
CJ1W-PNT21
COMM
100M
Figure 8.1: Indicators
Section 8-2
MS
NS
115