Omron V670 Series, User Manual

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8-2
The controller diagnoses many items to shorten the system down time preparing for error. When an error occurs, depending on a type of
error, you may read out the details of error through the programming console.
♦
Details of error
Errors detected by the controller are classified into the two types of errors. One terminates an operation and the other does not terminate
any operation.
• Error which terminates an operation
When a hardware error has occurred in the controller, the CPU operation is terminated and NORM/ERR (red) turns on.
• Error which does not terminate an operation
When an error in the communication between the controller and host device (host communication error) or between the antenna and tag
(communication error), the ERR LED turns on. A maximum of 30 errors are stored in memory. When 30 errors are stored in memory,
if an error occurs, the oldest error is deleted from memory and the new one is stored. By using the programming console, you can read
out the details of those errors and, moreover, the total number of occurrences per error.
: Turns on
: Turns off
* Turns on once when an error occurs.
Items
LED Display
RUN COMM NORM ERR
Normal operation Waiting for a command
Communicating with a tag
Communication with a tag completed correctly
Error which terminates
an operation CPU error
Error which does not ter-
minate an operation Communication error
*
Host communication error
*
8-2 Diagnosis Function