9-3
Section
Troubleshooting Tables
130
Error Log Storage Methods
The error log storage method is set in the Unit Setup Area in DM 6655, bits 00 to
03). Set any of the following methods.
1. 0 Hex: You can store the most recent 11 error log records and discard older
records. This is achieved by shifting the records as shown below so that the
oldest record (record 0) is lost whenever a new record is generated.
Error log record 10
Error log record 11
Error log record 1
Error log record 2
Oldest record lost
New record added
All records shifted
2. 1 Hex: You can store only the first 11 error log records, and ignore any sub-
sequent errors beyond those 11.
Error log record 10
Error log record 11
Error log record 1
Error log record 2
No changes after 11 records stored
Error generated
Error ignored
Clearing the Error Log
To clear the entire error log, turn ON SR 25214 from a Programming Device in
PROGRAM mode or using an instruction. (After the error log has been cleared,
SR 25214 will turn OFF automatically.)
9-3
Troubleshooting Tables
There are basically two types of error that can occur for the Customizable Count-
er Unit: Fatal errors, which stop operation, and non-fatal errors, which do not.
The ultimate cause of either of these errors could be in the Customizable Count-
er Unit or in the CPU Unit.
When an error occurs, the Customizable Counter Unit will perform the following.
•
Indicate the error on the Unit indicators.
•
Display an error message and error code on any Programming Device that is
connected.
•
Store the Customizable Counter Unit error code in SR 23500 to SR 23507 and
allocated word n+5 bits 00 to 07.
•
Turn on the relevant error flags and SR Area bits (SR 23508 to SR 23511).
•
Store an error record in the error log in DM 6144 to DM 6199, including the Spe-
cial I/O Unit error code, detailed information, and time.
The following tables provide the error information and corrective messages for
errors that can occur.
9-3-1 Fatal Errors
Any errors that occur should be investigated and remove immediately. After cor-
recting an error, restart the PC or clear the error from a Programming Device.
Customizable Counter Unit Fatal Errors
Summary of Contents for CS1 -
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