Omron CPM2C User Manual

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Self-diagnostic Functions Section 5-2
d) Use a Programming Device to set the CPM2C to PROGRAM mode.
2. I/O Wiring Checks
a) With the CPM2C in PROGRAM mode, check the output wiring by turn-
ing ON the output bits with the force set and force reset operations.
Refer to
4-2-26 Force Set, Reset for details.
b) Check the input wiring with the CPM2C’s input indicators or a Pro-
gramming Device’s monitor operations.
3. Test Run
a) Use a Programming Device to set the CPM2C to RUN or MONITOR
mode and check that the “RUN” indicator lights.
b) Check the sequence of operation with the force set/reset operations,
etc.
4. Debugging
Correct any programming errors that are detected.
5. Saving the Program
a) Use a Programming Device to write the program to a backup floppy
disk.
b) Print out a hard copy of the program with a printer.
Note Refer to Section 4 Using Programming Devices for details on the Support
Software and Programming Console operations.
5-2 Self-diagnostic Functions
The CPM2C is equipped with a variety of self-diagnostic functions to help
identify and correct errors and reduce down time.
5-2-1 Identifying Errors
An error can be identified by the error message displayed on a Programming
Device, error flags in the AR and SR areas, and the error code output to
SR 253.
Fatal and Non-fatal Errors PC errors are divided into 2 categories based on the severity of the errors.
The status of the ERR/ALM indicator (lit or flashing) shows which type of error
has occurred.
ERR/ALM Lit (Fatal Error)
Fatal errors are serious errors which stop CPM2C operation. There are two
ways to restart operation:
• Turn the PC OFF and then ON again.
• Use a Programming Device to switch the PC to PROGRAM mode, and
read/clear the error.
ERR/ALM Flashing (Non-fatal Error)
Non-fatal errors are less serious errors which don’t stop CPM2C operation.
Error Messages When an error is detected, a corresponding error message will be displayed
on the Programming Console or other Programming Device connected to the
PC.
Error Flags When a hardware error is detected, the corresponding error flag in the AR or
SR area will be turned ON.
Error Code When an error is detected, a specific 2-digit hexadecimal error code is output
to SR 25300 to SR 25307. The error code and time of occurrence are also
output to the Error Log Area (DM 2000 to DM 2021).
!WARNING Emergency stop circuits, interlock circuits, limit circuits, and similar safety
measures must be provided in external control circuits (i.e., not in the Pro-
grammable Controller) to ensure safety in the system if an abnormality occurs

Omron CPM2C Specifications

General

Brand	Omron
Model	CPM2C
Category	Controller
Language	English