Error Judgment Processing - Omron V460-H Series Network Connection Manual

9.2. Error Judgment Processing

This section describes error judgment processing by the software part.
9.2.1. Error Judgment by the Software Part
This software part performs error judgment processing for the following four types of errors (1)
to (4). Refer to 9.6. Error Code List for information on error codes.
(1) Communications error during TCP socket communications by manipulating dedicated
control bits
An error that occurred in TCP socket communications, such as main unit error, command
format error, or parameter error, is judged as a "communications error". The judgment is
made based on the response codes in the allocated DM Area for TCP socket
communications by manipulating dedicated control bits.
(2) Timeout error during communications with the code reader
An error that occurred due to abnormal open, send, receive, or close processing that
failed to complete within the monitoring time is judged as a timeout error. This judgment
is made based on timer monitoring in the software part. Refer to 9.2.2. Time Monitoring
Function for information on time monitoring using the internal timers of the software part.
(3) Code reader error
An error such as a command error, parameter error, or inexecutable error on the code
scanner is judged as a "code reader error". The judgment is made based on the
response data returned from the code reader.
* This error judgment is not supported by V460-H because it does not return a response
in the event of an error.
(4) TCP connection status error at end of processing
The software part uses a procedure in which the overall processing ends after the last
close processing is done, regardless of whether the open to receive processing steps
have ended normally or abnormally. Therefore, judgment of whether close processing
has ended normally is made according to the TCP Connection Status words in the
allocated DM Area. If there is an error in close processing, the next open processing may
not be performed correctly. Refer to 9.2.3. TCP Connection Status Error Situation and
Correction for information on how to correct a TCP connection status error.
CJ2M-CPU12 with
CJ1W-ETN21
Ethernet cable
(1) (2) (4)
9. Software Part
Code reader
(3)
37