Parameters > Citect.ini File Parameters > Trend Parameters > [Trend]WatchTime


The interval between Trends Server requests for data from the I/O devices. This parameter is ignored if you have a trend in your system that requests data at a higher rate - the Trends Server will request data as often as the trends in your system demand. For instance, if you set this value to 500ms, and a trend in your system has a sampling period of 300ms, the Trends Server will cater for this sampling period.

Note: The parameter value is not altered when the interval is automatically set for fast trends.

You can set this parameter to any value, but the lower the value, the more frequent the requests to the I/O devices, and this will cause an increased CPU load.

Allowable Values: 100 to 60000 (milliseconds)

Default Value: 500

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