Bentrup TC 2010 Bedienungsanleitung Seite 37

Table 7: programme setpoint
The programme setpoints are calculated according to the programme resp.
temperature curve entered by the operator. Some adjustments are possible for
easy operation. Automatic setpoint calculation required for cascade control
systems is also entered by the following settings
00: setpoint type
The following basic types creating a setpoint can be selected:
CON: Use initial value of the programme segment only. Typical applications are
offset values for zone temperatures or flap positions
MOD: Programme setpoint modulated by the segment time. This is the common
setting causing the programme setpoint to count upwards resp. downwards over
the segment time (e.g. within 2:00 hours from 0°C up to 1000°C)
CHA: Setpoint calculated by cascade control algorithm for details refer to the
example below
following parameters apply on selection CON only:
01: table source
Selects the column of the programme table used for setpoint calculation. TA01 is
the 1st column, ie. usually the pilot temperature
02: offset src SP
Defines a setpoint which refers to an existing setpoint, ie. the setpoint is calculated
by adding an offset setpoint to it. Used e.g. for the setpoint of the slave zones of a
multizone kiln. Using this option allows the operator to enter the temperature of
the slave zones as offset (temperature difference) relative to the master zone
setpoint.
03: idle setpoint
Setpoint if the controller is not on programme run. Used to hold a temperature
during a programme IDLE. Entering "0" switches off this option
04: error setpoint
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(options END, CON, MOD, CHA)
(value range CH/Z1 to TA05)
(value range OFF, SP00 to SP01)
(value range 99 to 1999)
(value range 99 to 1999)
Setpoint if the controller is in error state. Used to ensure a certain temperature is
maintained during ERROR. Entering "0" switches off this option
following parameters apply on selection MOD only:
11: table source
Selects the column of the programme table used for setpoint calculation. TA01 is
the 1st column, ie. usually the pilot temperature
12: offset src SP
Defines a setpoint refering to an existing setpoint, ie. the setpoint is calculated by
adding an offset to it. Used e.g. for the setpoint of the slave zones of a multizone
kiln. Using this option allows the operator to enter the temperature of the slave
zones as offset (temperature difference) relative to the master zone setpoint.
13: idle setpoint
Setpoint if the controller is not on programme run. Used to hold a temperature
during a programme IDLE. Entering "0" switches off this option
14: error setpoint
Setpoint if the controller is in error state. Used to ensure a certain temperature is
maintained during ERROR. Entering "0" switches off this option
following parameters apply on selection CHA only:
21: based on SP
Selects the programme setpoint used on a cascade control
22: charg.ctrl.LP
Selects the master control loop. A cascade control is used on applications where a
very lag workpiece (e.g. an large piece made of aluminium) needs heat treatment.
In an ordinary kiln it will take extended time until the workpiece has reached 600°C
if the kiln is dwelling at 600°C. When using a cascade control the main sensor is
connected directly to the workpiece and an additional sensor checks kiln tempera
ture. The kiln is controlled at a higher temperature to faster heat up workpiece;
once the temperature is getting closed kiln temperature is reduced accordinly. The
master control loop is configured as normal, ie. using the programme temperature
as setpoint and the target temperature as actual temperature. The output of this
(value range CH/Z1 to TA05)
(value range OFF, SP00 to SP01)
(value range 99 to 1999)
(value range 99 to 1999)
(value range SP00 to SP01)
(value range LP00 to LP01)
operating instructions bentrup TC20xx V1.9