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CHAPTER 11 TROUBLESHOOTING
11
11.
6
T
roubleshoot
ing by
S
ympt
om
11.6
Troubleshooting by Symptom
This section describes troubleshooting by symptom.
Perform troubleshooting by symptom when the temperature control module does not operate normally with no error.
When an error has occurred in the temperature control module, identify the error cause with the engineering tool.
(1) The temperature process value (PV) is abnormal
Check the following item.
(2) Parameters cannot be read or written with the engineering tool and CC-Link IE
Field Network diagnostics cannot be performed
Check the following items.
Check item
Action
The thermocouple wiring resistance value is too high.
• Check the thermocouple wiring resistance value and check whether a difference in the
temperatures was caused by the wiring resistance. (
• Use the sensor correction function to correct the difference in the temperatures caused
by the wiring resistance. (
Check item
Action
The D LINK LED of the main module is off or flashing.
Check if the D LINK LED of the main module is off or flashing, and perform
troubleshooting by referring to the following.
• The D LINK LED has turned off (
• The D LINK LED flashes (
The status of LEDs other than the D LINK LED (on, flashing, or off)
is indicating an error.
Check the status of LEDs other than the D LINK LED (on, flashing, or off). If the status is
indicating an error, perform troubleshooting by referring to the following.
• Checks Using LEDs (
An applicable module is not used for the master station.
Check the first five digits of serial number of the module used for the master station, and if
it is not applicable, replace it with an applicable module.
For the module used for the master station, refer to the following.
• Applicable master station (
The version of the engineering tool used is not applicable.
Check the version of the engineering tool, and if it is a version prior to the applicable one,
update the engineering tool. For the applicable version of the engineering tool, refer to the
following.
• Software package (
Network parameter settings differ from 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.
Online processing with the engineering tool cannot be performed
even after all of the checks (checks of the above-mentioned items,
LEDs of the module, CC-Link IE Field Network diagnostics of the
engineering tool, and error codes) have been done.
The possible cause is a module failure. Please consult your local Mitsubishi
representative.
Summary of Contents for NZ2GF2B-60TCRT4
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