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2408 CONTROLLER OVERVIEW
For comprehensive detailed information about the 2408 controller, refer to the operator’s user manual. This
section gives a brief overview of the front panel display and the key parameters used.
Figure 4: Model 2408 front panel layout
•
OP1 (Output 1) - When lit, it indicates that the output installed in module position 1 is on. This is normally
the heating output on a temperature controller.
•
OP2 (Output 2) – Module not installed.
•
SP2 (Setpoint2) - When lit, this indicates that set point 2, (or a set point 3-16) has been selected.
•
REM (Remote Set point) - When lit, this indicates that a remote set point input has been selected. ‘REM’ will
also flash when communications are active.
•
Auto/Manual button - When pressed, this toggles between automatic and manual mode: If the controller is
in automatic mode the AUTO light will be lit. If the controller is in manual mode, the MAN light will be lit.
The Auto/Manual button can be disabled in configuration level.
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Run/Hold button - Press once to start a program (RUN light on.) Press again to hold a program (HOLD light
on). Press again to cancel hold and continue running (HOLD light off and RUN light ON). Press and hold in for
two seconds to reset a program (RUN and HOLD lights off). The RUN light will flash at the end of a program.
The HOLD light will flash during holdback or when a PDS retransmission output is open circuit.
•
Page button - Press to select a new list of parameters
•
Scroll button - Press to select a new parameter in a list
•
Down button - Press to decrease a value in the lower readout
•
Up button - Press to increase a value in lower readout
Basic Operation
Switch on the power to the controller. It runs through a self-test sequence for about three seconds and then
shows the measured temperature, or process value, in the upper readout and the target value, called the set
point, in the lower readout. This is called the Home display.
You can adjust the set point by pressing the up/down buttons. Two seconds after releasing either button, the
display blinks to show that the controller has accepted the new value.
OP1 will light whenever output 1 is ON. This is normally the heating output when used as a temperature
controller.
