Instruction manual

3130
Before autotuning can
take place, you must
select a damping set-
ting. 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 set-
point. When autotuning
is complete, the [ tUnE ]
display will stop flash-
ing and the Gain, Rate
and Reset numbers
"learned" will be kept in
memory for subsequent
startups.
Tu n i n g
P ro c e d u re s
or T, enter “15”. For Control Output type E, F or S, enter
“00”.
8) Press the Parameter/Access key until Setpoint Target Time
[ SP.tt ] 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 [Ac.Cd ]
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 [ Gr.o2 ] is displayed, set it to [ 1.0 ]. Otherwise,
continue scrolling until [dPnG ] appears. Set Damping ini-
tially to Normal [ nL ]. (This setting may have to be changed
later. See Notes on Damping, page 28).
11) Press and hold the Mode key until [ tUnE ] flashes
in the lower display window. The controller is now autotun-
ing. 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.
Autotuning will not function when process is at setpoint.
Figure 13. Typical “Autotune” Temperature Profile.
Tu n i n g
P ro c e d u re s
played. (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 [ Ht.P ] [ CL.P ]
On/Off [ Ht.O ] [ CL.O ]
Press the Parameter/Access key again to step to output
2 [ OUt2 ]. Repeat the selec-
tion process for cooling mode.
If only one output is PID, set the other output to On/Off.
5) Press the Parameter/Access key again to display the
Cooling Type parameter [
CoL.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 Parame-
ter/Access key once. The lower window will
display [Ac.Cd ] 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 [ CY.t1 ] and
Cycle Time for Output 2 [ CY.t2 ]. For Control Output type B