Watlow CLS - Manual (Page 99)

Setup
CLS User’s Guide 91
Deviation Band Value
Use this menu to set the deviation bandwidth, a positive and negative
alarm or control point relative to the setpoint. If the setpoint changes,
the alarm or control points also change. You can assign a separate
digital output to the high and low deviation alarm/control setpoints--so
that, for example, a high deviation alarm turns on a fan and a low
deviation alarm turns on a heater.
Selectable values: 0-255, 25.5, 2.55, .255 or .0255, depending on the
way you set up the Input menus.
High Deviation Alarm Type
Use this menu to disable the high deviation alarm function or set it to the
alarm or control function. (The high deviation alarm activates if the
process value (PV) rises above the deviation band value, and remains
active until the PV goes below the deviation band value minus the
deadband value.)
Selectable values: Alarm, Control, Off
High Deviation Alarm Output Number
Use this menu to assign a digital output which activates when the loop is
in high deviation alarm. The digital output only activates if you have set
the high deviation alarm type to Alarm or Control.
NOTE
All digital outputs are OR'd together (combined). There-
fore you can assign more than one alarm to the same
output number, and that output will be On if any of those
alarms is On.
Selectable values: Any output number between 1 and 34, as long as that
output is not already used for control or the SDAC clock, or you may
select None.
LOOP PROCESS UNITS
ALARM SETPOINT STATUS OUT%
02 DEV ALARM
VALUE ? 5
º F
LOOP PROCESS UNITS
ALARM SETPOINT STATUS OUT%
03 HI DEV ALARM
TYPE ? OFF
LOOP PROCESS UNITS
ALARM SETPOINT STATUS OUT%
01 HI DEV ALARM
OUTPUT ? NONE