Despatch LBB2-xxA/B-1 - Manual (Page 34)

O PERATION
LBB Series Oven Owner’s Manual
34 Version 15
Copyright © 2012 by Despatch Industries.
All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any
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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 Operating and Set-up 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 Operating 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)
4
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
4 If P is not displayed the Control Mode (CtL) must be first set to PID.