Watlow PPC-2000 - Manual (Page 152)

Chapter 3: Operating with AnaWin 3 PPC-2000 User’s Guide
126 Watlow Anafaze Doc.# 30002-00 Rev 2.3
LP Enable
Set this field to enable or disable the low process alarm. When
it is Enabled, the low process alarm activates if the process
variable (PV) dips below the LP Limit. The PV must rise above
the LP Limit plus the alarm deadband to be reset (cleared). When
this parameter is set to Disabled, the low process alarm does not
occur.
Range: Enable or Disable
LP Output Dest
Choose a digital output to toggle when the low process alarm
occurs. This may be any available hardware output or Soft
Boolean register accessible by the logic program. The default
for this parameter is None. Outputs that are already assigned
to control output destinations will be rejected. The same output
may not be used for multiple alarm output destinations.
Range: None, or any of the digital outputs on the DigI/O
spreadsheet, or any of the Soft Bool registers.
Alarm Deadband
Set this parameter to prevent process and deviation alarms
from toggling on and off when the process variable is near the
alarm limit set point. For high alarms the deadband is below
the set point; for low alarms the deadband is above the set
point. An alarm that occurs when the process variable crosses
the alarm set point will not clear until the process returns
within the alarm set point, and the deadband value. The
default alarm deadband is 2.
Range: Depends on the input type selected.
Alarm Delay
Set this parameter to delay alarm reporting. Use this feature to
prevent false alarms due to noise on sensors. The alarm delay
applies to failed sensor alarms and process and deviation
alarms. Only alarms that are present for longer than alarm
delay time are reported.
Range: 0 to 100 seconds