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Technical Manual Temperature-, Humidity-, Pressure-Controller TAR x260
Functional Description
Sensor connection
The controller operates either with temperature
sensors of the types TF201 (PTCs) and TF 501
(PT1000) or with a 4...20 mA signal. The input
will be selected by parameter P26.
The selection of inputs and sensors depends
on your requests:
Temperature Controller:
For temperatures < 80°C use sensors
TF 201 or TF501.
For temperatures > 80 up to 300°C you
must select an appropriate Pt1000 sensor.
Pressure controller:
4...20mA from pressure transmitter
Humidity controller:
4...20mA from humidity transmitter
Operation modes
The controller can be configured for different
operating modes (with parameter P14):
P14 = 1: 2 control sensors
Sensor 1 effects to setpoint 1, sensor 2
effects to setpoint 2. So you realize 2
independent single stage temperature
controllers in one unit. In this mode the
4...20mA input is de-activated.
P14 = 2: 1 control sensor or transmitter
(dual stage control)
Sensor Input 1 or the 4...20 mA Signal
Input effects to both setpoints (P03 / P04),
Sensor Input 2 is de-activated. P03 is an
absolute value, P04 can be also relative
(adjustable by P05).
P05 = 1: Setpoint 2 (P04) is an absolute
value (used for dual stage control
with individual setpoints)
P05 = 2: Setpoint 2 (P04) is a relative value
(used for dual stage control with
neutral zone, that means that P04
will be shifted the same amount if
P03 is shifted)
P14=3:
1 control 1 sensor for
setpoint shift
Sensor 1 effects to setpoint 1 (P03), sensor
2 may shift setpoint 1. The 4...20 mA input is
de-activated. With this, you realize e.g. an
outdoor temperature guided control.
P19 is the limit from which a rise or lowering
(shift) becomes possible, P20 is the range
of the shift, P21 the amount of the shift.
Example:
- Control Setpoint 1
P03 = 10°C
- Limit value
P19 = 20°C,
that means increasing starts with 20° at
sensor input 2, below that value there's no
shift.
- range of shift
P20 = 5K,
that means shift range is 25K in total, above
25°C at sensor 2 maximum setpoint shift.
- Size of shift
P21 = 8K,
from 25°C the control setpoint is P03 + 8K, in
this example = 18°C.
P18 shows the current shift amount. This
value is a sum of the day/hight shift and
the setpoint shift.
P14 = 4: 2 control sensors, cyclic defrost
function is active.
Sensor 1 effects to setpoint 1, sensor 2
effects to setpoint 2. With this configuration
you realize two independent single stage
controllers in one unit like above, but
parameters 20/21 get a different function.
Cooling via setpoint 1 (i.e. the output
effected by setpoint 1) is disabled in specific
time intervals to enable air flow defrost.
The 4...20 mA input is deactivated.
Actual value display / status display
With temperature sensors:
Temperatures can be displayed in °C or °F
selected by parameter P26 (= sensor type
switch). The resolution is 0.1°C (or 0,2°F).
While operating with temperature sensors,
P01 shows the actual value of sensor 1.
You also come back to this display at P01,
if another parameter is selected and no key
is pressed for about 4 minutes.
In operation modes 1, 3, 4 and 5 P02 shows
the actual temperature value of sensor 2.
With 4...20 mA transmitters:
In op-modes (P14) 2 and 5 the “4...20 mA”-
input is activated and can be read at P01.
The standard current signal can be delivered
by an 4...20 mA source or appropriate
transmitter.
Adapting of humidity and pressure transmitters,
display correction
A transmitter delivers the measured value as a
4...20 mA signal. With parameter P30/P29 the
measuring scale will be preset.
Example 1: Humidity transmitter,
Range 0...100% r.H.
P29 = 100, P30 =0
Example 2: Pressure transmitter,
Range –0,5 ... +9.0 bar
P29 = 9,0 and P30 = -0,5
With P27 the display of actual value P01 can be
corrected, with P28 a correction of the value
displayed by P02 is possible.
setpoint
amount of shift
P21 (8°)
shifted
setpoint
(18°)
setpoint
P03 (10°)
setpoint course
limit
P19 (20°)range of shift
P20 (5K)
range
limit
(25°C)
P02
Switching hysteresis
For the setpoints P03 / P04 you can fix a
switching hysteresis with parameters P12 and
P13. The position of the hysteresis (above/
below the setpoint) depends on the selected
relay switching mode (P07 resp. P08).
Setpoint limits
To prevent the setpoints being set to an invalid
value (e.g. not below 0°C), the range of P03 /
P04 can be restricted by parameters P10 and
P11.
Day / night shift - 2
nd
Setpoint
E. g. to save energy it is possible to work with
other setpoints at any time. By parameter P06
an offset value can be set on which all setpoints
will be shifted if Digital Input OK 1 is activated.
Temperature- resp. Limit Value Alarm
If the value measured with sensor 1 or the
delivered 4...20 mA signal leaves the range
preset by parameters P32 and P33, then an
alarm relay and a buzzer will be activated after
a delay timer (P31) is run down. P22 shows the
remaining time of the alarm delay timer.
P33 (lower limit) is an absolute value and P32
is always a relative value coupled to the current
setpoint (P03 + eventually shift).
Relay switching characteristic
The switching characteristic of relays K1 and
K2 are defined by parameters P07 and P08.
The following options can be selected:
1= Refrigeration (Standard)
Used for standard applications (e.g.
temperatures above 0°C).
The load would be switched by the NO-
contact.
alarm after P31 is run down
alarm after P31 is run down
Lower limit
P 3 3
(absolute)
Upper limit
P 3 2
(relative)
temperatur flow
cold
stage ON
stage OFF
w a r m
setpoint
hysteresis
