Pixsys DRR244 - Keys; Controller Functions; Modification of Main and Alarm Setpoint Value; Automatic Tune

User manual - DRR244 - 13
6.2 Keys
11

• Increases the main setpoint.
• During configuration allows to scroll the parameters or the groups of parameters.
• Increases the setpoints.
12

• Decreases the main setpoint.
• During configuration allows to scroll the parameters or the groups of parameters.
• Decreases the setpoints.
13
SET
• Allows to visualize command and alarm setpoints.
• During configuration allows to enter the parameter to be modified and confirms the
variation.
14
FNC
• Allows to enter the Tuning launch function, automatic/manual selection.
• During configuration works as exit key (ESCAPE).
15
c
• ON during the rising phase of the pre-programmed cycle;
d
• ON during the falling phase of the pre-programmed cycle;
c
d
• Both ON during parameter modification, when this is not a default value.
7 Controller Functions
7.1 Modification of main and alarm setpoint value
Setpoint value can be modified from keyboard as follows:
Press Display Do
1


Value on display 2 changes.
Increases or decreases the main setpoint
value.
2
SET
Visualizes the other setpoints on display 1.
Display 2 shows the setpoint type.
3


Value on display 1 changes.
Increases or decreases the alarm setpoint
value.
7. 2 Automatic Tune
Automatic tuning procedure allows a precise regulation without delving into the PID regulation
algorithm. Selecting Auto on par. 73 tun.1 (for the regulation loop 1), or on par. 98 tun.2 (for the
regulation loop 2), 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 , or on par. 98 tun.2, the procedure can be activated in three ways:
• 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. (or on par. 239 d.i.2.F.). At first activation of digital input (commutation
on front panel) led TUN led switches on and at second activation switches off.
• Running Tuning by serial input:
Write 1 on word modbus 1216 (command 1) or 1217 (command 2): led TUN switches ON and the
procedure starts. Write 0 to stop the tuning.