Rev. 1.2
Operating Manual 979429.02
Page 12 of 13
Walther Systemtechnik GmbH
– D 76726 Germersheim
Telefon: +49 (0)7274-7022-0 Telefax: +49 (0)7274-7022-91
http://www.walther-2000.de
6.2 P.I.D. Programming
Menu
Selection
Description of Selection
Default
0.1 -99.9 (%)
Input value proportional term of P.I.D. control
5.0
2 - 1999
Input value integral term (time value) of P.I.D. control
100
0 - 399
Input value of differential term of P.I. D. control
20
0.0 - 1.0
Input value overshoot suppression
0.2
2 - 199
Input value of a proportional cycle. Usual value at SSR (voltage-puts output) = 2, with use
of relay outlet J2 8relay contact-output) = 5-15
2
0 - 3
Digital filter factor
0
After selecting
, confirm your menu setting by pushing
..
You will now
automatically return to the menu selection or the control mode.
6.3 Function "Automatic Self-Adjustment" (Autotuning)
The control unit 979429.02 has a program that automatically finds the optimal P.I.D. settings of the
connected load. For this purpose it is necessary that the control unit is ready-to-operate, the load is clamped
on, and an uncritical set value for temperature is already set.
CAUTION
When the auto-tuning function is used, the control unit runs through one or several
control cycles in order to determine the parameters. In doing so, strong deviations from
the set value may appear. Take this into consideration when setting the set value.
Process
Result
Simultaneously press the buttons
and
hold for approx.4 seconds.
The red LED (AT) flashes. The process is finished
when AT stops blinking.
In order to turn off auto-tuning earlier, press the arrow button
for approx. 4 seconds until AT stops
blinking. The previous settings remain unchanged.
Access to these parameters is obtained by pressing
"SET"
and then entering the code
0036.
Use the table below for the settings or corrections of the P.I.D. temperature values, after
you have selected the setting 1 or 2 ac
cording to the parameter table “Basic Settings” as
operating mode under
OUTY
. We recommend defining a basic setting beforehand by
using the auto-tuning function.