Pixsys ATR 621 series, Руководство пользователя, Страница: 21 / 100

ATR 621 - User manual 21
Press Display Do
3
OK
Green display shows the
process. Red display shows

, where the output
percentage value is visualized
. Controller starts to modulate
the command output.
To modify percentage pres
or . To esc press
START
STOP
for a
second.
8
Programmer functions
8.1
Hold function
This function allows to interrupt the cycle: red display visualizes

and
cycle advancement is stopped. By pressing and it is also possible to
modify the setpoint.
There are two possibilities to start this function:
• By keyboard: set

on parameter 33

.
Press
PRG
M
for a second: function will be started or stopped.
• By digital input: select

on parameter 27

(only for ATR621-
12ABC e 14ABC).
NB : It is not possible to enable Hold function by parameter 33

if para-
meter 27

has already been set on

.
8.2
Automatic tuning
Automatic tuning procedure has been conceived to give user the possibility
to have a clear regulation also without knowledge of PID regulation algori-
thm. Setting

on parameter 11

, the controller will check process
oscillations and will modify PID parameters if the diff erence between process
and setpoint values is greater than value on P-13

.
Parameters 13

, 14

, 15

and 16

can be modi-
fi ed entering the dedicated password 5678 .