646
Troubleshooting
Section 12-2
12-2-6 Other Errors
Communications Errors
■
CPU Unit Indicators
POWER
Lit
RUN
Lit
ERR/ALM
---
INH
---
LNK/ACT
---
BKUP
Not lit
Probable cause
Possible remedy
An error has occurred in the communica-
tions between the Ethernet port and con-
nected device.
Confirm that the Ethernet port settings in the
PLC Setup are correct.
Check the Ethernet cable and replace it if
necessary.
An error has occurred in the communica-
tions between the serial port and connected
device.
Confirm that the serial port 1/2 settings in
the PLC Setup are correct. Check the cable
wiring. If a host computer is connected,
check the serial port settings and program in
the host computer.
An error has occurred in the CX-Program-
mer's Response monitoring time if the cycle
time was too long.
Modify the CX-Programmer’s response mon-
itoring time longer according to the following
method.
Start the CX-Programmer. Select Change
Model from the
PLC
Menu. The
Change
PLC
Dialog Box will be displayed. Click the
Settings
Button on the right side of
Network
Type
. The
Network Settings [USB]
Dialog
Box will be displayed. Click the
Network
Tab
and increase the value in
Response Time-
out(s)
.
POWER
RUN
INH
LNK/ACT
BKUP
ERR/ALM
Summary of Contents for CP1L-EL20DR-D
Page 3: ...CP1L EL20D CP1L EM30D CP1L EM40D CP1L EL EM CPU Unit Operation Manual Produced July 2017...
Page 4: ...iv...
Page 10: ...x...
Page 22: ...xxii...
Page 34: ...xxxiv Software Licenses and Copyrights 7...
Page 192: ...158 Trial Operation and Debugging Section 5 3...
Page 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Page 666: ...632 Trouble Shooting Section 11 7...
Page 696: ...662 Standard Models Appendix A...
Page 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Page 836: ...802 PLC Setup Appendix G...
Page 838: ...804 TCP Status Transitions Appendix H...
Page 840: ...806 Ethernet Network Parameters Appendix I...
Page 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Page 844: ...810 Ethernet Specifications Appendix K...
Page 851: ...Index 817 work words 118 write protection 447...
Page 852: ...818 Index...
Page 854: ...820 Revision History...
Page 855: ......