4. Alarms
– Display Historical and on-line Alarms
– Events too
5. – Alarm limit when Tag value is too high; generates an alarm message when the tag value is equal to or
greater than the HiHi Limit value.
– Alarm limit when Tag value is high; generates an alarm when the tag value is equal to or greater than the Hi
Limit value.
– Alarm limit is when Tag value is low; generates an alarm when the tag value is lower than or equal to the Lo
Limit value.
– Alarm limit is too low; generates an alarm when the tag value is lower than or equal to the LoLo Limit value.
– Determines the speed of the variation rate for a tag. If the variation speed is higher than the established one
in this field, generate an alarm. The speed can be determined per second, minute, or hour.
– Deviation for a higher value; generate an alarm when an augmentation in the tag value is equal to or higher
than the established limit.
– Deviation for a lower value; generate an alarm when a diminution in the tag value is equal to or higher than
the established limit.
6. Deadband Value & Time
HiHi
Hi
Deviation+
Deviation
Setpoint
Deviation-
Rate
Lo
LoLo