I-54
FX Series PLC User's Manual - Data Communication Edition
Remote Maintenance
8 Troubleshooting
8.1 Checking FX PLC Applicability
8. Troubleshooting
This chapter explains troubleshooting.
8.1
Checking FX PLC Applicability
Verify that the FX PLC main unit version is applicable to remote maintenance.
For the version applicability check, refer to Section 1.3.
8.2
Checking Programming Tool Applicability
Verify that the programming tool version is applicable to remote maintenance.
For the version applicability check, refer to Section 1.4.
The remote maintenance function cannot be used when FXGP/WIN is used in the following versions of
Windows:
- Windows NT
4.0
- Windows
2000
- Windows
XP
8.3
Checking Communication Status Based on LED Indication
Check the status of the "RXD (RD)" and "TXD (SD)" indicator LEDs provided in the optional equipment
When the power is turned ON, the FX PLC transfers the AT command to the connected modem. At this time,
the "RXD (RD)" and "TXD (SD)" indicator LEDs in the communication equipment light instantaneously.
If modem initialization is not set in parameters in the FX PLC, however, these LEDs do not light.
If the wiring and/or modem specifications are different, these LEDs flash several times, but the FX PLC does
not transfer the AT command.
8.4
Checking Installation
1. Mounting status
If the communication equipment is not securely connected to the PLC, communication is not possible.
For the mounting method, refer to the respective communication equipment manual.
LED status
Operation status
RXD (RD)
TXD (SD)
Flashing
Flashing
Data is being sent or received.
Flashing
Off
Data is received, but is not sent.
Off
Flashing
Data is sent, but is not received
Off
Off
Data is not sent nor received.
Summary of Contents for FX-485ADP
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Page 120: ...B 2 FX Series PLC User s Manual Data Communication Edition N N Network ...
Page 188: ...C 2 FX Series PLC User s Manual Data Communication Edition Parallel Link ...
Page 244: ...D 2 FX Series PLC User s Manual Data Communication Edition Computer Link ...
Page 344: ...E 2 FX Series PLC User s Manual Data Communication Edition Inverter Communication ...
Page 700: ...H 2 FX Series PLC User s Manual Data Communication Edition Programming Communication ...
Page 752: ...I 2 FX Series PLC User s Manual Data Communication Edition Remote Maintenance ...
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