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11
Installation and Operation
Manual
Series A3 & A4
variable. Below are the possible parameters that would be shown with the factory
default program.
Set Point 1 Low
(SP1 lo)
Set Point 1 High
(SP1 hi)
Set Point 1
(SP1)
Set Point 1 Deadband
(SP1 db)
Set Point 2 Low
(SP2 lo)
Set Point 2 High
(SP2 hi)
Set Point 2
(SP2)
Set Point 2 Deadband
(SP2 db)
Alarm Low
(AL lo)
Alarm High
(AL hi)
* To change the displayed parameters on the LCD during normal operation, see
Moving Program Variables (section 5.1).
Control
(Ctrl)
– Selection of the control type will determine which
parameters are or are not available in the remainder of the Set-up Menu as
well as the Main Menu. Example: If 1 Set Point is selected, there will be no
parameters for Set Point 2 or Alarm in the programming.
1 Set Point (1SP)
– For control with one SPDT relay
2 Set Point (2SP)
– For control with two independent SPDT relays
Set Point Alarm (SPAL)
– For control with one SPDT relay and one
alarm relay
Alarm (AL)
– For alarm operation only
Set Point Settings
(Set 1 & Set 2)
– Each set point can be entered as a high
and low value for the turn on and off point or as an set point and a floating
dead band. Low High operation is best suited for applications that have a set
turn on and turn off point. Set Point Deadband is suited for application that
may require changing the set point from time to time but the deadband will
always remain the same. The below graphs illustrate the differences.
Low High (lohi)
– For a high and low set point
Set Point Deadband (SP db)
– For a set point and floating dead band
4.3 Set-Up Menu
