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CHAPTER 11 TROUBLESHOOTING
11
11.6 Troubleshooting by Symptom
(2) When an A/D conversion completed flag does not turn on in the normal mode
(3) When the digital operation value is out of the accuracy range
(4) When the output status of the extension output module differs from the link
device status of the master station
(5) When parameter read or write, or CC-Link IE Field Network diagnostics fails by
engineering tool
Check item Action
Does any input signal error occur? Check Input signal error detection flag (RWrA).
Check item Action
Is any measure against noise taken? Take anti-noise measures including the use of shielded cables for connection.
Check item Action
Is the setting of the external signal assignment function
correct?
Check that the following assignments are not used in the external signal assignment function.
• Input signal error detection signal assignment ( Page 207, Appendix 3 (4))
• Alert output signal assignment ( Page 208, Appendix 3 (5))
• Error flag assignment ( Page 209, Appendix 3 (6))
• Warning flag assignment ( Page 210, Appendix 3 (7))
Check item Action
Is the D LINK LED of the main A/D converter module on?
Check the D LINK LED of the main A/D converter module and if it is not on, perform
troubleshooting by referring to the following:
• When the D LINK LED turns off ( Page 182, Section 11.4 (5))
• When the D LINK LED flashes ( Page 182, Section 11.4 (6))
Check for other LEDs by referring to the following.
• Checking the LEDs ( Page 181, Section 11.4)
Is the version of the module on the master station correct?
Check the serial number (first five digits) of the module on the master station, and if it is prior to
the supported versions, replace the module with a module of the supported version. For the
supported version, refer to the following:
• Supported master station ( Page 49, Section 5.2 (1))
Is the version of the engineering tool supported?
Check the version of the engineering tool, and if it is prior to the supported versions, update
the engineering tool. For the supported version, refer to the following:
• Supported software package ( Page 49, Section 5.2 (4))
Are network parameter settings same as the settings of the
CPU module?
Perform "Verify with PLC" and check that network parameter settings match the settings of the
CPU module. If they differ, match the settings by performing "Read from PLC" and "Write to
PLC", and write the parameters to modules on slave stations.
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