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PART 2: CX-Server PLC Tools
OMRON
CHAPTER 6 – PLC Error Component
CX-Server PLC Tools_Page 71
CHAPTER 6
PLC Error Component
This chapter describes the PLC Error component and its ability to display and clear PLC errors, the PLC Error Log
and messages.
The PLC Error component is only available when the PLC is online.
The PLC Error component provides a view of current errors occurring in the PLC’s CPU and allows them to be
cleared when the cause of the PLC error has been removed (providing the PLC is in the correct mode). Errors
occurring are also written to the PLC Error Log and displayed in the PLC Error component automatically although,
if set to Manual Refresh, the error history is only updated when the
Refresh
button is selected.
Messages are displayed when a user-defined MSG instruction in the ladder program is encountered; these
messages may have been defined as part of an error trap or to provide more general information. Messages may
also be generated by the system in certain circumstances.
When a number of errors have occurred on the PLC, the most serious error is displayed automatically. For detailed
information concerning a PLC error, refer to the relevant PLC manual.
The status bar displays the connected device and PLC mode and the PLC Clock (if one is present and clock
monitoring has been enabled from the
Options
menu).
♦
The Error Log is always available for CV and CS1/CJ1-series PLCs but can be selectively enabled or disabled
for C-series PLCs.
The PLC Error component can be forced to stay as the top window by selecting the
Settings
option from the
Options
menu and checking the
Always on Top
setting on the
General
tab.
Access to the PLC Error component is from the invoking application. If a serious error has occurred, the PLC
Error component is displayed automatically.
To close the PLC Errors dialog, select the
Close
button in the title bar.
Errors
The
Errors
tab of the PLC Error component displays the current error status of the PLC, when an error is detected
in the PLC it is shown with the item identifier, code position, error status level and error details. The icon next to
the item number indicates the type of error detected and reflects the error status in the
Status
column.
Errors may be cleared but this is dependent upon removal of the cause of the error in the PLC and the PLC’s
operating mode.
When the PLC is in Program Mode, all errors can be cleared; when in Monitor mode, only the last error can be
cleared. It is not always possible to clear an error when the PLC is in Run mode; in this instance, a dialog is
displayed which allows an attempt to be made at clearing the error. Providing the cause of the error has been
rectified, the error can be cleared, although the PLC mode may need to be switched to achieve this.
Use the following procedure to clear errors.
1, 2, 3…
1. Select
the
Errors
tab in the PLC Error component.
2. Select
the
Clear All
pushbutton.
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