overview
It uses Ping(ICMP) to diagnose the status of computers and network devices connected via TCP/IP.
For each tag, the state of each device is expressed as a Boolean value (TRUE/FALSE).
TRUE - There has been a response from the other device.
FALSE - No response from the other device.
Settings Dialog Details
Communication Settings
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•Communication Method
Normally, select "Perform read communication asynchronously."
•Update time
The interval for checking the status of each other device.
•Multi-threaded connection
If this box is not checked, when multiple Ping tags are registered to one unit, Ping will be performed in the order in which the tags were registered. In this case, the Ping response will be waited for one by one, so if the response time is long or there is a timeout, there will be a delay before the next Ping tag is processed. On the other hand, by checking this box, communication for registered Ping tags will be performed in parallel, so there will be no delay.
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If you are registering multiple Ping tags, we recommend checking this setting ("Connect with multi-threading ..."). However, if you check this, and a large number of tags are registered in the Ping unit, thread resources will be used for the number of tags. In particular, 32-bit applications have strict limitations on the number of threads that can be used, so be sure to check the operation when handling a large number of Ping tags.
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Tag address setting
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•Destination IP address
The IP address of the device you want to diagnose.
•timeout
Timeout for response.
•retry
The number of retries when the
Ping response fails.
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If Ping responses occasionally fail due to network environment conditions, etc., you can set a "moving average" in the tag filter so that if a specified number of consecutive failures occur, it will be considered as no Ping response.
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