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


Determines how long the trend server will wait (in milliseconds) between each read of trend samples.

Setting this parameter to 0 (zero) causes the read thread to give up the rest of its current CPU time slice.

If this value is -1, there will be no delay between reads. You should avoid setting this parameter to -1 if you have many clients. In extreme cases of many clients doing many trend read requests, it may be necessary to increase the value of ReadWatchTime so that the main CitectSCADA thread still gets all its work done.


Do not change the [Trend]ReadWatchTime parameter in the citect.ini file, except on the advice of Technical Support for this product.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Allowable Values: -1 to 60 000 (milliseconds)

Default Value: 1

See Also