Specifications

App - 50
Appendix 4.1 How to Check Errors Using LED Displays
This section describes the errors that can be checked with the LED displays on the front
of the Ethernet module.
Appendix 4.1.1 Checking error display
The following can be checked with the LED displays on the front of the Ethernet module.
<Ethernet module LED>
QJ71E71-100
RUN
INIT.
OPEN
SD
ERR.
COM.ERR.
RD
100M
LED name Status to check Cause/corrective action
1 [RUN]
Turns off after
powering on
the Ethernet
module. (*1)
1) Watchdog timer error
•
When a watchdog timer (approximately 600 ms) error occurs, the watchdog
timer error detection signal (X1F) is turned on by the self diagnosis function of
the Ethernet module.
2) Ethernet module installation fault
•
Check if the power supply capacity (5VDC) of the power supply module is
insufficient.
•
Turn off the power supply and reinstall the module.
2 [ERR.]
Turns on after
powering on
the Ethernet
module. (*1)
1) Module parameter setting error
•
Check/correct the parameter setting values for the Ethernet module using the
GX Developer.
2) PLC CPU error
•
When the PLC CPU's [RUN] LED is off/flashing, or the [ERR.] LED is on, check
the content of the error occurring in the PLC CPU and correct the problem.
• Check that the Ethernet module is installed on the Q mode PLC CPU.
3) Ethernet module error (H/W error)
3 [COM.ERR]
Turns on after
powering on
the Ethernet
module.
1) Check the contents of the error using the error codes stored by the error
detection of the following processing, and remove the causes.
•
Initial processing • Open processing
•
Fixed buffer send processing • Data communication processing
•
E-mail send/receive processing
•
Other processing (processing by which error codes are stored in the error log
area)
4 [SD]
The [SD] LED
does not flash
at data
sending.
1) [ERR.] or [COM.ERR.] LED turns on.
•
Remove the factors that turn on the [ERR.] or [COM.ERR.] LED.
2) Poor cable connection
•
Check the connection of the cable.(*2)
3) Program reviewing is required
•
Review the sequence program for sending.
(Continued to the next page)