If The Sd Led Does Not Flash When Data Is Sent; If Data Cannot Be Received With The Rd Led Off - Mitsubishi Electric QJ71E71-100 User Manual

16.4.3

If the SD LED does not flash when data is sent

The following table lists the items to be checked and the actions to be taken if the SD LED does not flash when data is
sent.
Check item
Is the ERR. LED or COM.ERR. LED on?
Are the cables properly connected?
Is the program correct?
If the action above does not solve the problem, perform the following tests on the E71 to check for hardware error.
• Hardware test (
• Self-loopback test (
16.4.4

If data cannot be received with the RD LED off

The following table lists the items to be checked and the actions to be taken when an E71 cannot receive data with the
RD LED off.
Check item
Is the ERR. LED or COM.ERR. LED on?
Are the cables properly connected?
Are the parameter settings correct?
Is the program correct?
If the action above does not solve the problem, perform the following tests on the E71 to check for hardware error.
• Hardware test (
• Self-loopback test (
286
Remove the cause that turned on the ERR. LED or COM.ERR. LED.
Check the cable connection. In addition, perform a line test to check if there
is a problem with the cable connection and the Ethernet line.
( Page 363, Appendix 5)
Correct the send program of the E71.
Page 374, Appendix 6.2)
Page 373, Appendix 6.1)
Remove the cause that turned on the ERR. LED or COM.ERR. LED.
Check the cable connection. In addition, perform a line test to check if there
is a problem with the cable connection and the Ethernet line.
( Page 363, Appendix 5)
Correct the IP address, router setting, and subnet mask setting of the own
station.
Correct the send program of the connected device.
Page 374, Appendix 6.2)
Page 373, Appendix 6.1)
Action
Action