O
PERATION
LBB Series Oven Owner
’s Manual
34
Version 13
Copyright © 2011 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
means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and
retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
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
bS
PV Bias
(Offset)
Expressed in degrees, from
–199 to 999. Use this
parameter to set the actual oven temperature to the
controller display.
0
LoC
Key Lock
Provides levels of access to the controller:
0 = No key lock, full access to controller
1 = Prevents changing of all parameters except
setpoint
2 = Prevents all parameters from being changed
including the setpoint
-1 = Set to enter the Set-up parameter setting display.
1
nr
Manual
Reset
Only when
I
&
d
are
OFF
. Expressed in percent.
Controller outputs this value when process variable equals
setpoint, but only if I =
0
.
N/A
HyS
Hysteresis
Only when
CtL
is
OFF
, change CtL to PID)
Expressed in degrees. When CtL = OFF, this value
determines the change in temperature needed to turn
controller output from full
OFF
to full
ON
.
N/A
5.4.2.2.
Control Instrument Operating Mode Notes
The controller is factory set to
LoC
=
1
(allowing only the setpoint to be changed).
This setting prevents inadvertent changing of control parameters.
If necessary to alter control parameters, change the
LoC
=
1
to
LoC
=
0
. See Section
5.4.2.1 for more information.
When
LoC
=
-1
, parameters are displayed in the order shown in the Set-Up
Parameters table (Table 4).
Note:
If unable to change setup parameters:
o
Change the
LoC
=
0
o
Press the
until
LoC
appears again
o
Change
LoC
=
-1
o
Press the
Table 4. Control Instrument Set-up Parameters.
Code Name
Description
Settings
In
Input Type
Set for type of input and whether PV is in °C or °F
5
(35 if F)
SPH
Setpoint High
The maximum setpoint limit for oven. The user cannot
set the setpoint above the maximum setpoint.
204 (400
if F)
