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8
TROUBLESHOOTING
8.1 Troubleshooting Flowchart
8.1.4 When "Communication error is detected in some slave stations"
8 - 12
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
FUNCTIONS
5
PREPARATORY
PROCEDURES BEFORE
OPERATION
6
LINK DATA SEND/
RECEIVE PROCESSING
AND PROCESSING TIME
7
PROGRAMMING
8
TROUBLESHOOTING
8.1.4 When "Communication error is detected in some slave stations"
Figure 8.11 When "Communication error is detected in some slave stations"
NO
YES
YES
Normally loopbacked?
Normal?
NO
NO
YES
Were all slave stations up
to the last one checked?
Master station is suspected to be faulty.
Replace link module.
Error occurred.
Connect GX Developer to master station
and have link monitor screen displayed.
Turn slave station back to ON after
checking, and then check next one.
Conduct self-loopback test for
suspected link module.
Turn off each of stations in order
starting from No.1, and check link
status on link monitor of master tation.
Fault is suspected to be present
between power-off slave station and
next station. When loopback can be
performed with station No.1 turned
OFF, master station may be faulty.
Replace faulty link cable.
Conduct station-to-station test between
suspected stations to check link cable.
*1*1 *1*1
*1 If programmable controller cannot be turned OFF, disconnect link cable.