Error Messages And Corrective Actions - Mitsubishi Electric GOT2000 Series User Manual

3.8

Error Messages and Corrective Actions

The following table lists error messages displayed when the device monitor is carried out and describes the corresponding
corrective actions.
Error message
Failed to communicate with CPU.
A device has exceeded a specified device
range.
The number of the target devices for
monitoring has exceeded its maximum.
Displaying device comments has failed.
Local device monitoring has failed.
Failed to write the value to the device.
A device that cannot be monitored exists.
The device range has been changed.
Writing a TC set value has failed.
The device that has been specified as a
security condition is invalid.
Reading a comment file has failed.
Obtaining the program name has failed.
No program is in execution.
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3.8 Error Messages and Corrective Actions
Explanation
Communication with the target PLC for
monitoring cannot be established.
Because the data range was changed to
one with a larger number of bits, a device
that has exceeded the range is included in
the targets for display.
The number of the target devices for the
registration for monitoring is larger than its
maximum.
No device comment file exists.
The target program for local device
monitoring does not exist or has been
deleted.
The target device for writing a value does
not exist or the target device is outside the
range.
A device outside the range is included in
those on display.
During GOT startup, the parameter of the
PLC was changed then a device on display
has fallen outside the range.
The target program for writing a timer or
counter setting value does not exist or has
been deleted.
The device that has been specified as a
device test authorization device for the
system security setting does not exist or is
outside the device range.
• If drive A has been specified in the GOT
setup as the destination for saving data:
The SD card slot cover on the GOT is
open.
• No stored comment file exists on the SD
card or USB memory that has been
connected to the GOT.
No program has been written to the PLC
CPU.
In using the TC monitor, there is no
program being scanned.
Action
• Check the connection (a connector disconnection, a break in a
cable) between the PLC and GOT.
• Check if the PLC has caused an error.
• Refer to the following to check if a network error has occurred.
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GOT2000 Series User's Manual (Monitor)
Change the data rage back in the previous number of bits.
The number of the target devices for monitoring beyond its
maximum cannot be registered.
Delete unnecessary registered devices before registering.
Create a device comment file.
Start the local device monitor again and select a program from the
alternatives in the list.
Check the range of devices with the parameter of the PLC.
Change the display position of devices.
Restart the GOT.
Start the TC monitor again and select a program from the
alternatives in the list.
• Check the range of devices with the parameter of the PLC.
• Check the device test authorization device for the system
security setting.
• Close the SD card slot cover and select the comment file again.
• In the comment file list dialog, select an existing comment file.
To the PLC, write a PC parameter and sequence program that are
consistent with each other.
Start to scan a program.