Despatch LBB2-xxA/B-2 - Manual (Page 33)

LBB Series Oven Owner’s Manual O PERATION
Version 18 33
5.4.2. Control Instrument Parameter Programming Mode
Warning!
Changing program parameters alters the function of the Control.
Proceed carefully and fully understand each parameter before
changing that parameter.
Control instrument parameters are set through the Operating and Set-up modes. In most
applications, it is not necessary to alter the oven settings. The following instructions describe how
to access, view and if desired, change the parameters. Once the Operating and Set-up modes are
accessed,
SP will start blinking on and off. Table 4 and Table 5 explain the Operating and Set-up
Mode parameters.
The Control Instrument will not allow the display to be altered improperly. The Control
Instrument will automatically exit the Parameter Programming mode if no keys are pressed for
about two (2) minutes.
5.4.2.1. Entering Control Instrument Set-up and Configuration Mode
To enter the Operating and Set-up Mode (Figure 4):
1.
Press for three (3) seconds.
2. Press until the desired parameter displays. See Table 4 for more information.
3. Press ▲ or ▼ to display the value.
4. Use ▲ or ▼ to move to the desired setting.
5. Press to enter the value.
6. Press and hold for three (3) seconds to return to the display mode.
Table 4. Control Instrument Set-up Parameters.
Code Name Description Settings
CtL
Control
Mode Determines whether controller functions as a time
proportional or an on/off control.
PID
At Auto-tuning OFF for PID tuning, ON for controller to tune process OFF
P Proportional
Band Expressed in degrees, value determines the band width
on both sides of the setpoint within which the control
provides proportional control. 4
(8 if
°°°°
F)
*
I Integral
Time Expressed in seconds, value corrects for errors in actual
temperature versus the setpoint 15
d Derivative
Time Expressed in seconds, value shows the effect of the
derivative time is in direct proportion to the time setting 0
Ct Cycle Time Expressed in seconds, value shows total time for one
ON/OFF cycle of the controller output during the
proportional action 1
FL Input Filter Expressed in seconds. Use this function when the PV may
fluctuate greatly (for example, when an input signal
contains noise) 0