Red Lion TCU - Manual (Page 25)

UNPROTECTED PARAMETER MODE
The Unprotected Parameter Mode is accessed by pressing the PAR button
from the normal display mode with program disable inactive. In this mode,
the operator has access to the list of the most commonly modified controller
parameters. At the end of the list, a configuration “access point” allows the
operator to enter the configuration parameter modules. These modules allow
access to the fundamental set-up parameters of the controller. When the
program list has been scrolled through, the controller displays “End” and
returns to the normal display mode. The unit automatically returns to the
normal display mode if no action is taken.
Unprotected Parameter Mode Reference Table
Display Parameter
Range and
Units (Factory
Setting Value)
Description/
Comments
SP Temperature
Setpoint Confined to
range of limits
SPLO, SPHI, 1
or 0.1 degree
(0) Appears only if setpoint value is
locked (LOC) or read only (rEd).
OPOF %Output
Power
Offset -99.9% to
100%
(0.0) Appears only if integral time
(Intt) = 0 and controller is in
automatic mode.
OP Output
Power -99.9% to
100%
(0.0) Appears only if controller is in
user (manual) mode and %
output power is (LOC) or read
only (rEd). This parameter is not
limited to output power limits
(OPLO & OPHI).
Prop Proportional
Band 0.0 to 999.9% of
selected input
range
(4.0) 0.0% is ON/OFF control. If using
ON/OFF mode, set control
hysteresis appropriately.
Intt Integral
Time 0 to 9999 sec.
(120) 0 is off. This parameter does not
appear if proportional band =
0.0%.
dErt Derivative
Time 0 to 9999 sec.
(30) 0 is off. This parameter does not
appear if proportional band =
0.0%.
Pb-2 Proportional
Band #2
(Secondary) 0.0 to 999.9% of
Scaled input
range
(4.0) 0.0% is ON/OFF control.
Second Analog Input models
only.
It-2 Integral
Time #2
(Secondary) 0 to 9999 sec.
(0) 0 is off. This parameter does not
appear if proportional band #2 =
0.0%. Second Analog Input
models only.
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