Red Lion TCU - Manual (Page 24)

Parameter Entry
The PAR button is used to select the desired parameter. To modify the
parameter setting use the UP and DOWN buttons. Press PAR to enter the new
value. The controller progresses to the next parameter. In a Configuration
Parameter Module, pressing the DSP button causes the new value to be
rejected, the controller displays “End”, and returns to the Normal Display
Mode. For those parameters outside the Configuration Parameter Modules,
the new value takes effect and is committed into controller memory WHILE
the value is keyed in. The following is a list of commonly modified
parameters:
Setpoint
Output Power
Output Power Offset
Proportional Band
Integral Time
Derivative Time
Proportional Band #2
Integral Time #2
Derivative Time #2
Directed Setpoint (Cascade)
Ratio
Bias
Alarm 1 Value
Alarm 2 Value
Note: While in a Configuration Parameter Module, all new parameters are
rejected and the old ones recalled if power is removed from the controller. If
power is removed while modifying any parameter, be certain to check the
parameter for the proper value.
Normal Display Mode
In the normal display mode, the process temperature is always displayed in
the main display. By successively pressing the DSP button, one of these
operational parameters can be viewed in the secondary display (model
dependent):
Temperature Setpoint
% Output Power
Heater Current
Second Analog Input (Remote Setpoint)
Temperature Setpoint Deviation
Temperature Units Symbol (°F or °C).
Each of these displays can be independently locked out from appearing or
from being modified by the user (see Lockout s Module , page 28). Only from
t h e n o r ma l d i s p l a y mo d e c a n a c c e s s b e g a i n e d t o t h e o t h e r mo d e s
(Unprotected, Protected, or Hidden).
Modifying A Secondary Display Parameter From The Front
Panel
The controller must be in the normal display mode to modify the secondary
display parameters. The Temperature Setpoint value and % output power (in
manual mode) are the two parameters which may be modified. The other
parameters are read-out values only.
Temperature Setpoint Value - Use the up and down arrow buttons to modify
the setpoint value when viewed, if not locked. If locked, the setpoint can be
changed in the unprotected mode when “SP” is viewed, independent of
viewing in the secondary display. The setpoint value is confined to the
programmable setpoint limit values (SPLO & SPHI, Input Module 1).
% Output Power - The % Output Power can only be changed when the unit is
in the manual mode. See Manual (User) and Automatic Operations, page
13. The annunciator %PW lights, and the Manual annunciator flashes
when viewed. Use the up and down arrow buttons to modify the % Output
Power if not locked. If locked, the % output power can be changed in the
unprotected mode when “OP” is viewed, independent of viewing in the
secondary display. The % output power is not confined to the programmable
output power limit values (OPLO & OPHI, Output Module 2).
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