Chapter Six: Operation in Tuning Mode
General Information
157
The Two Levels within Tuning Mode
Figure 43, page 158, depicts the differences in functionality and in key operation between the
two levels of Tuning Mode.
The Upper Level of Tuning Mode
When Tuning Mode is first entered, it is always operating at the upper level. This is true
regardless of whether or not any Tuning Mode parameters (
BASE
,
START
,
INTEGRAL
,
PRESET
,
GAIN
,
LEAD
, or
SET POINT
), are currently displayed. This level is used to scroll among the
parameters and observe their current values, but no parameter editing can be done at this level.
It is important to understand that the Valve Position parameter does not have a specific legend as
do all other Tuning Mode parameters. In order to select the Valve Position parameter, the
Control Mode parameter
HOLD
or
MANUAL
must be displayed. Additionally, you must
move through the Tuning Mode parameters until none of the other Tuning Mode parameters are
displayed. There are two ways to move to the Valve Position parameter.
One press of the [
QUIET
/
CANCEL
] key selects the Valve Position parameter (no Tuning Mode
parameters are displayed). Alternately, the Valve Position parameter can be selected by scrolling
to it with the arrow keys. As Figure 43, page 158, shows, the Valve Position parameter is
positioned between the
BASE
parameter and the
SET POINT
parameter. If the
BASE
parameter legend is displayed, one press of the
selects the Valve Position parameter. If the
SET POINT
parameter legend is currently displayed, one press of the
selects the Valve
Position parameter.
The
and
keys the [
QUIET
/
CANCEL
] key, and the [
ENTER
] key function differently in the
two levels of Tuning Mode. On the upper level, the arrow keys scroll through the Tuning Mode
parameters
BASE
,
START
,
INTEGRAL
,
PRESET
,
GAIN
,
LEAD
,
SET POINT
, and Valve Position
(remember, there is no Valve Position parameter legend). The [
QUIET
/
CANCEL
] key first selects
the Valve Position parameter, and if pressed again, returns the 146 unit to Normal Mode. The
[
ENTER
] key selects a parameter for editing and moves to the lower level of Tuning Mode.
The Lower Level of Tuning Mode
The lower level of Tuning Mode is used for parameter editing. To move from the upper level to
the lower level, move to the parameter to be edited, then press the [
ENTER
] key.
On the lower level, the arrow keys increment and decrement the value of the selected parameter.
For example, if the
GAIN
parameter is selected for editing, then the
increases the
displayed value for
GAIN
, and the
decreases it.
On the lower level the [
QUIET
/
CANCEL
] key has an additional function. When first pressed, the
key returns the editable parameter to its pre-edited value. For example, if
GAIN
is the editable
parameter, and its initial value is 5, the
key increases the value to 6. If the [
QUIET
/
CANCEL
]
key is pressed, the value for
GAIN
returns to 5. After this initial operation, the
[
QUIET
/
CANCEL
] key returns to the upper level.
When still on the lower level, the [
ENTER
] key causes the 146 unit to accept the value for the
currently editable parameter, and returns the unit to the upper level of Tuning Mode.
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