red lion PXU10020, Instructions Manual

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-16-
Drawing No. LP0932 Released 2018-01-12


0
PrP
SETPOINT RAMP RATE
0
to
999
display units/minute
By ramping the setpoint at a controlled rate, the setpoint ramp rate can
reduce sudden shock to the process and reduce overshoot on startup or
after setpoint changes. When viewing setpoint value, and the setpoint is
ramping, the setpoint will alternate between
rP
x and the target setpoint
value. The ramp rate is in least-significant (display units) digits per minute.
A value of 0 disables setpoint ramping. Once the ramping setpoint
reaches the target setpoint, the setpoint ramp rate disengages until the
setpoint is changed again. If the ramp value is changed during ramping,
the new ramp rate takes effect. If the setpoint is ramping prior to starting
Auto-Tune, the ramping will terminate when Auto-Tune starts. Deviation
and band alarms are relative to the target setpoint, not the ramping
setpoint. A slow process may not track the programmed setpoint rate. At
power up, the ramping setpoint is initialized to the current temperature/
process value.
ACTIVE SETPOINT VALUE
-999
to
9999
display units
CONTROL OUTPUT 1 or 2 % OUTPUT POWER
0.0
to
100.0
The parameter name indicates the active setpoint or the active profile
segment number if in Setpoint Profile operating mode (
P
=
ProF
). When
the Setpoint Control Mode is SP (
P
=
P
), the Setpoint value can be
changed by pressing the arrow keys. This parameter can be configured
as read only in the Display Loop, but read/write in the Hidden Loop (
dPr
).
Select the second Setpoint value by using the 1 or 2 key, user input,
or the
PL
parameter. Both Setpoint values are limited by the Setpoint
Low and High Limits in Input Module
1-IN
.
While the controller is in Automatic Mode, this
value is read only. When the controller is placed in
Manual Mode, the value can be changed by
pressing the arrow keys. For more details on %
Output Power, see Control Mode Explanations.


rN
r-
CONTROLLER STATUS
OP rN Pnd PA PAdv
If the controller is in Setpoint Profile mode (
P
=
ProF
), placing the unit
in run mode will start the active profile.
If a profile is running, placing the controller in
OP
mode will stop and
terminate the profile. The
Pnd
,
PA
, and
PAdv
selections are only available
in Setpoint Profile mode (
P
=
ProF
). Selecting
Pnd
will end the profile
and the controller will control the active segment’s setpoint. Selecting
PA
will pause the profile setpoint and timer at their current values. If the
profile setpoint is ramping and the profile is paused, the unit will control
to the current ramping setpoint value. Pausing a profile will extend the
overall profile run time. Once paused, select run to resume the profile.
Selecting
PAdv
will advance the profile to the next segment. This will
cause a step change of the active segment setpoint (if the new segment
setpoint is different from previous segment’s setpoint, this will cause a
step change of the active segment setpoint).


1
PId
PID GROUP
1
to
6
or
Auo
Select different PID parameters by choosing one of six different PID
groups or Auto. For further details see Control Mode Explanations - PID
GROUPS..
The following parameters may be locked from the display or made
available in either the main Display Loop, the Parameter Loop or the
Hidden Loop as configured in programming module
3-LC
. Values
configured for
dPr
are read only when in the main display loop, but are
writable when in the Hidden Loop.


0
P
x


0.0
OP1


0.0
OP2
Display/Parameter/Hidden Loop Parameter Descriptions


A B C D
P
PROFILE STATUS
Profile Status provides indication of the current run status of the active
profile. The four display digits, “ABCD”, provides indication of the status
as follows
Digit A: Run Status (
r
,
d
,
P
,

,

)
r
Profile is running, the profile timer is timing
d
Profile is automatically delayed, PV is outside Profile Error Band
Value, Profile timing is delayed
P
Profile has been manually paused

Profile has ended and controlling to last setpoint

Profile has ended and PID Control Stopped
Digit B: Ramping/Hold status
- Profile Segment SP is ramping up
- Profile Segment SP is ramping down
- - Profile Segment SP is holding (soak)
Digit C: Active Profile (0 - F)
Digit D: Active Segment (0 - F)
Example PCS displays
r 00
Profile is running, ramping up, Profile 0, Segment 0
d-00
Profile is delayed at Profile 0, Segment 0; SP is holding (soak)
r-00
Profile is running, SP is holding (soak), at Profile 0, Segment 0
r 01
Profile is running, SP is ramping down, at Profile 0, Segment 1


0.0
C1
CURRENT TRANSFORMER DISPLAY VALUE
The Current Transformer Display Value parameter is available only on
models which include the CT option. This parameter is a display of the
scaled
C1
input and is a read only value.