FX
2N
-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK
Troubleshooting 5
5-1
5.
Troubleshooting
If a problem has occurred, check the following contents.
Checked position
Status
Action
LEDs on master block
POWER LED is extinguished. 5V DC supplied from PC has come down.
24V DC LED is extinguished. Supply 24 VDC power to "+24" and "-24".
RUN LED is extinguished.
An error has occurred in communication with a
remote I/O unit set by on-line station setting switch.
Check SHORT, OPEN and PARITY LEDs to detect
causes of error.
SHORT LED is lit.
Check whether DATA and DG are short-circuited.
OPEN LED is lit.
Check whether signal lines (DATA and DG) are dis-
connected. Check whether power of remote I/O
unit is turned off.
Check ERROR STATION LEDs to detect a station
with a communication error.
PARITY LED is lit.
Something is wrong with data received from a
remote I/O unit. Noises may be generated.
ERROR STATION LED
(0 to F) is lit.
Check a remote I/O unit corresponding to a lighting
LED.
On-line station setting
switch on master block
Switch of station No. corre-
sponding to connected
remote I/O unit is set to OFF.
Set it to ON.
Station No. of remote
I/O unit
One station No. is assigned
to two or more remote units.
One station No. can be set to only one remote unit.
Summary of Contents for FX2N-16LNK-M
Page 1: ...USER S MANUAL FX2N 16LNK M MELSEC I O LINK REMOTE I O SYSTEM MASTER BLOCK ...
Page 8: ...FX2N 16LNK M MELSEC I O LINK REMOTE I O SYSTEM MASTER BLOCK Contents vi MEMO ...
Page 50: ...FX2N 16LNK M MELSEC I O LINK REMOTE I O SYSTEM MASTER BLOCK Troubleshooting 5 5 6 Memo ...
Page 58: ...FX2N 16LNK M MELSEC I O LINK REMOTE I O SYSTEM MASTER BLOCK Appendix A 6 Memo ...
Page 59: ...FX2N 16LNK M MELSEC I O LINK REMOTE I O SYSTEM MASTER BLOCK ...