13
Tuning
Procedures
Introduction
The Series 16 is an “on demand” autotuning controller that automatically sets PID parameter values
(Proportional Band, Reset and Rate) before the process reaches setpoint. A damping setting (menu level
“02”) MUST be selected for autotuning to take place. The controller may also be tuned manually.
1) With the power off and the process at ambient, apply power and immediately put the controller in
Standby mode by holding the key for four seconds until [ StbY ] flashes in the lower display window.
2) Enter the desired Setpoint Value using the appropriate Raise or Lower key. [ StbY ] will continue
to flash.
3) If controller is in menu level “00” or “01”, hold the Parameter/ Access key for 11 seconds until
[ A c. C d ] appears. Then change to menu level “05”. Otherwise, press the key once and use the
key to select menu level “05”.
4) Press the Parameter/Access key twice until [ SnSr ] is displayed to make sure that the proper
sensor has been selected. Then set the controller’s heating mode or alarm functions by pressing the
Parameter/Access key again until [ O U t1 ] is displayed. (If you scroll past it, just continue scrolling
until the parameter menu repeats.) Using the appropriate Raise or Lower key, select the one of
the following settings according to the requirements of your process. Note: For autotuning, at least one
output MUST be set to PID mode.
Mode Output 1 (Heat) Setting Output 2 (Cool) Setting
PID [ H t. P ] [ C L. P ]
On/Off [ H t. O ] [ C L. O ]
Alarm [ ALr ] [ ALr ]
Press the Parameter/Access key again to step to output 2 [ OUt2 ]. Repeat the selection process for
cooling mode or alarm. (If only one output is PID, set the other output to either On/Off or Alarm.)
5) Press the Parameter/Access key again to display the Cooling Type parameter [ C o L. t ], and select
either Normal/Linear output [ nor ] or Water-Cooled/Non-Linear output [ H2o ].
6) Exit menu level “05” by pressing the Mode key once. The lower window will flash [StbY]. Now press
the Parameter/Access key once. The lower window will display [A c. C d ] and [ 05 ]. Press the
Lower key twice to select menu level “03”.
7) Press the Parameter/Access key and select Cycle Time for Output 1 [ C Y. t1 ] and Cycle Time for
Output 2 [ C Y. t 2 ]. For Control Output type B, T or Y, enter “15”. For Control Output type E, F or S,
enter “00”.
8) Press the Parameter/Access key until Setpoint Target Time [ S P. t t ] is displayed. Select [ OFF ].
9) Press the Mode key once. The lower window will again flash [StbY]. Press the Parameter/Access
key once and the lower window will display [A c. C d ] and [ 03 ]. Press the Lower key once to
select menu level “02”.
10) Press the Parameter/Access key and scroll through the displayed parameters. If Gain Ratio [ G r. o 2
] is displayed, set it to [ 1. 0 ]. Otherwise, continue scrolling until [dPnG ] appears. Set Damping
initially to Normal [ nL ]. (This setting may have to be changed later).
11) Press and hold the Mode key until [ tUnE ] flashes in the lower display window. The controller is
now autotuning. When it stops flashing, the autotuning procedure is completed and the controller is
ready for your process. As a security measure, you may wish to place the controller in Key Lock “00” or
Limited Access “01” Run mode by changing menu levels as instructed previously.
Note: Re-tune controller only from ambient temperature. Autotuning will not function when process is at
setpoint.
For best results in
tuning the
temperature
controller, the
setpoint value should
be at least 100° F
above or below
ambient
temperature.
While some
processes other than
heat or cool
applications may
respond successfully
to autotuning, the
controller must be
manually tuned for
most non-
temperature
processes.
Before autotuning
can take place, you
must select a
damping setting. If
the damping
parameter does not
appear on the menu,
you have not
selected a PID
option for outputs 1
or 2. Refer back to
step (4) and select
the proper setting(s).
During autotuning,
the process
temperature will
gradually cycle from
ambient to setpoint.
When autotuning is
complete, the [tUnE]
display will stop
flashing and the
Gain, Rate and Reset
numbers "learned"
will be kept in
memory for
subsequent startups.
Figure 11. Typical “Autotune” Temperature Profile.
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