WESTLOCK CONTROLS CORPORATION
280 N. MIDLAND AVE., STE. 258, SADDLE BROOK, NJ 07663 TEL: 201-794-7650 FAX: 201-794-0913
www.westlockcontrols.com
10/5/2013
TECH-477/D.W.O. 21424
Page 108 of 206
9.6.3 Alarm AI
Located under Diagnosis, it has a group of parameters to read and configure the upper
and lower alarms and warnings.
ALARM_HYS
Limit Hysteresis: Hysteresis expressed in the engineering units of the output
value scale. An alarm occurs when a value exceeds an
upper limit. The alarm’s status remains true until the value
drops below the limit minus the alarm hysteresis. The
directions are reversed for low limit detection. The
hysteresis is also used for warnings.
Alarm/Warning Limits
Upper Limit Alarm: Upper alarm limit in engineering units.
Upper Limit Warning: Upper warning limit in engineering units.
Lower Limit Warning: Lower warning limit in engineering units.
Lower Limit Alarm: Lower alarm limit in engineering units.
HI_HI_ALM
Unacknowledged Alarms: Unacknowledged alarms.
Status: Status for the upper alarm.
Time Stamp: The time of day when a change in limit stated was
detected that was unreported.
Cause: Cause of the upper alarm.
Alarm Output Value: Output value at the time of the upper alarm.