Auto Tune Method 3.4 - Partlow MIC 8200 Installation And Operation Manual

P 36
AGE
(Continued from page 35)
STEP DESCRIPION
13 Position Prop.
Sensitivity
(SEnS will be seen
if out1=7 and
out2=0 or 7)
14 First Output
Position
15 Second Output
Position
(SoP will not be
seen if out2=0
* ArS2 and rt2 are not used by the Control algorithm if both Output 1 and Output 2 are
selected for the same proportional control (reverse or direct). The parameters are used when
one output is selected for direct and the other is selected as reverse.
Note: The Program, Tune and Enable Mode selections can be conveniently recorded on
the Software Reference Sheet located in Appendix E (page 76).

Auto Tune Method 3.4

The Auto Tune function will select the tuning parameters for a proportional control heating
application assigned to Output 1. For the Auto Tune to properly calculate the Tune mode
parameters, the Program and Tune mode parameters listed below must be correctly se-
lected.
3.4.1 PROGRAM MODE PARAMETERS THAT AFFECT AUTO TUNING
1. Output 1 out1 must be set for proportioning reverse (heating) (4, 6, 7) output action.
2. Output 1 upper limit o1uL can be used to limit the maximum heating output percentage.
This will affect the process response curve used to calculate the tuning parameters. If
overshooting or Er56 occurs, reducing the maximum output percentage may be
necessary.
3. Output 1 lower limit o1LL can be used to select a minimum output value. The
instrument can be directed to output this minimum value if the Auto Tune aborts (fails)
by use of the Auto Tune Abort AAo option.
4. Output 2 out2 can not be selected as time or current proportioning reverse (4 or 6). If
out1 = 7, then out2 must be 7. Out2 may be used for direct cooling action.
5. Auto Tune can only be initiated when Setpoint Configuration SPC is 0, 1, 2, or 3 and
SP1 is active. In other words, when SP2 or remote setpoint is active, Auto Tune can
not be initiated and the AUTO TUNE key is ignored. If SPC is 4, Auto Tune can not be
initiated.
6. The Auto Tune will not function if the Setpoint Ramp Rate is selected other than 0.0.
DISPLAY AVAILABLE
CODE SETTINGS
SEnS 0.0 to 50.0%
FoP -1000 to 1000°/units
SoP -1000 to 1000°/units
FACTORY YOUR
SETTING SETTING
1.0
0
0