Watlow MLS - Manual (Page 101)

Setup
MLS User’s Guide 89
When the controller powers up or the setpoint changes, deviation alarms
do not activate until the process goes inside the deviation alarm band--
preventing deviation alarms during a cold start. (High and low process
alarms are always enabled.)
Use menus to set the following process alarm parameters for each loop:
• High and low process alarm type, setpoint, and digital output.
• High and low deviation alarm type, deviation alarm value, and alarm
digital output.
• Alarm deadband.
• Loop alarm delay.
The setpoints, deviation alarm values, and deadband all use the same
decimal format as the loop's process variable.
High Alarm Limit
Setpoint
Low Alarm Limit
SP + Deviation
SP - Deviation
} Deadband
} Deadband
} Deadband
} Deadband
High deviation alarm on
High deviation alarm off
Low deviation alarm on
Low deviation alarm off
High process alarm off
High process alarm on
Low process alarm on
Low process alarm off