Omron V750 series, Network Connection Manual

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9. Program
39
9.3.2. Time Monitoring Function
This section explains the time monitoring function of this program.
You can change the monitoring time settings by changing the variables of the
ParameterSet function block.
● Time monitoring function of the communication instruction processing
To avoid errors that keep a communications process executing without a stop, the timer in
this program is used to abort the processing (timeout). The timeout value for each
processing from the connect processing to the close processing is 5 seconds.
[Monitoring time of the communications instruction processing]
Processing Monitoring Variable name
Timeout
time
Connect
processing Time from the start to the end of the
processing
TopenTime
5 seconds
(UINT#500)
Send
processing Time from the start to the end of the
processing
TfsTime
5 seconds
(UINT#500)
Receive
processing
Time from the start to the end of the
processing
(for each receive processing)
TfrTime
5 seconds
(UINT#500)
Close
processing Time from the start of the processing until
the TCP socket enters the close status.
TcloseTime
5 seconds
(UINT#500)
● Receive waiting function for divided packets/multiple response data
To repeat the receive processing, this function enables waiting for multiple responses that
arrive continuously or the receive data that is divided. If the next response does not arrive
from the destination device within the maximum waiting time, it is detected that the receive
processing ended.
[Receive waiting time]
Processing Monitoring Variable name Maximum waiting time
Receive wait Interval to receive data TrTime 300 ms (UINT#3)
● Resend/time monitoring function of TCP/IP
When a communication problem occurs, TCP/IP automatically resends the data and
monitors the processing time if there is no error in the Controller. If the processing ends in
an error, this program performs the close processing and stops the TCP/IP resend/time
monitoring function.
*If a TCP connection status error occurs at the close processing, the TCP/IP resend/time
monitoring function may be still operating. For information on the situation and corrective
actions, refer to
9.7.2. TCP Connection Status Error and Corrective Actions
.