Pixsys ATR224 User Manual

14 - ATR224 - DRR224 - User manual
7. 2 Automatic Tune
Automatic tuning procedure allows a precise regulation without delving into the PID regulation
algorithm. Selecting Auto on par. 73
t u n .1 (for the regulation loop 1), the controller analyzes the proces
oscillations and optimizes the PID parameters.
Led TUN flashes.
If the PID parameters are not yet selected, at the device switch-on, it is automatically launched the
manual Tuning procedure described into the next paragraph.
7. 3 Manual Tune
Manual procedure allows the user greater flexibility to decide when to update
PID algorithm parameters. During the manual tuning, the device generates a step to analyze the
system inertia to be regulated and, according to the collected data, modifies PID parameters.
After selecting
Manu. on par. 73 t u n .1 , the procedure can be activated as follows:
• Running Tuning by keyboard:
Press FNC until display 2 shows tunE with display 1 on dis. and then press SET: display 1 shows Enab.
Led TUN switches ON and the procedure starts.
• Running Tuning by digital input:
Select t
unE on par. 231 d . i .1 . F. . At first activation of digital input (commutation on front panel) led TUN
led switches on and at second activation switches off.
To avoid an overshoot, the treshold where the controller calculates new PID parameters is determined
by this operation:
Tune threshold = Setpoint -
“Set Deviation Tune” (par. 74 s.d.t.1)
Ex.: if the sepoint is 100.0∞C and the Par.32
s.d.t.1 is 20.0∞C the threshold to calculate PID parameters
is (100.0 - 20.0) = 80.0∞C.
For a greater precision on PID parameters calculation it is suggested to start the manual tuning
procedure when the process deviates from the setpoint.
7.4 Tuning once
Set once on parameter 73 t u n .1 .
Autotuning procedure is executed only once at next device restart. If the procedure doesn’t work, will
be executed at next restart.
7. 5 Digital input functions
The ATR224 and DRR224 functions related to digital inputs, can be enabled by parameter 231 d . i .1 . F. .
•
2t.Sw .: Two threshold setpoint modification: with digital input active the device regulates on SET2,
otherwise reulates on SET1;
•
ru n .: The regulation is enabled only with digital input active,
•
tune: Enables/disables the Tuning if par. 73 t u n .1 is selected as manu.;
•
au.ma.i.: If par. 48 a.ma.1. is selected as enab. or en.sto., with impulse command on digital input, the
device switches the related regulation loop, from automatic to manual and vice versa.
•
au.ma.c.: If par. 48 a.ma.1. is selected as enab. or en.sto. the devices switches to manual the related
regulation loop, with digital input active, otherwise the regulation is automatic.
•
Act. ty.: the device execute a cooling type regulation with digital input active, otherwise the
regulation is of heating type;
•
M. reS.: Allows the reset of the output if manual reset is active for the alarms and for the command
outputs.

Pixsys ATR224 Specifications

General

Brand	Pixsys
Model	ATR224
Category	Controller
Language	English