| The alarm scan time parameter will tell
Citect at what rate to process the alarms. This parameter defaults
to 500ms. At this rate Citect will try to process the alarms every
500ms. However if Citect cannot read all the alarm data from the
I/O Device within 500ms, the alarms will be processed at a slower
rate. For example, if it takes 800ms to read all the alarm data
from the I/O Device, Citect will then process the alarms every
800ms.
This option is useful if you want to tune the performance of
Citect. For example slowing down the alarm scan time will cause the
Alarm Server to use less CPU (as it does not have to process the
alarm records as often). It will also reduce the amount of data
read from the I/O Device so that other processed (Trends, Reports,
and the current page) will get their I/O Device data more
quickly. |
