Connection Diagram ( for PT244-T-
AA )
W2C30
RTD1
RTD2
RTD3
1
2
4
5
P
N
NO
C
230V
SSR
+
SSR -
12
6
7
8
11
TC
+
-
Caution for your safety
WIRING:
The probe and its corresponding wires should
never be
installed in a conduit next to control or power
supply lines. The
electrical wiring should be done as shown in the diagram. The
power supply circuit should be connected to a protection switch.
The terminals admit wires of upto 2.5sq mm.
WARNING:
Improper wiring may cause irreparable damage and
personal injury. Kindly ensure that wiring is done by qualified
personnel only.
Maintenance:
Cleaning: Clean the surface of the controller with a
soft moist cloth. Do not use abrasive detergents, petrol, alcohol or
solvents.
Notice:
The information in this document is
subject
to change in
order to improve reliability , design or function without prior notice
and does not represent
a commitment on the part of the company.
In no
event will the company be liable for direct, indirect, special,
incidental or consequential damage arising out of the use or
inability to use the product or documentation, even if advised of
the possibility of such damages. No part of this manual may be
reproduced or transmitted in any form or by any means without
the prior written permission of the company.
Controller
:Controller should be installed in a place
protected by vibration, water and corrosive gasses and
where ambient temperature does not exceed the values
specified in the technical data.
Probe :
To give a correct reading, the probe must be installed
in a place protected from thermal influences, which may
affect the temperature to be controlled.
Product Mounting
Installation :
Fixing and dimensions of panel models:
To fix the unit, slide the fastener 1 through the guides 2 as per the
position shown in the figure. Move the fastener in the direction of the
arrow, pressing tab 3 it permits to move the fastener in the opposite
direction of the arrow.
45.5mm
45.5mm
Panel Cutout
Dimensions
48mm
48mm
PV
SV
PT244-T
Operating Manual
PT244-T / PT244-K / PT244-T-AA
Introduction
A proportional–integral–derivative controller (PID controller or three
term controller) is a control loop feedback mechanism widely used in
industrial control systems and a variety of other applications requiring
continuously modulated control. A PID controller continuously
calculates an error value as the difference between a desired
setpoint (SV) and a measured process variable (PV) and applies a
correction based on proportional, integral, and derivative terms
(denoted P, I, and D respectively) which give the controller its name.
PT244-T is a two set point PID controller. It is available in touch &
keypad version. Customized iconic display interprets status easily.
48mm
1
2
3
CONTROLLER
GASKET
PANEL
Side Lock
Connection Diagram ( for PT244-T-
)
W2C30
RTD1
RTD2
RTD3
1
2
3
4
5
P
N
NO1
C1
230V
SSR
+
12
6
7
8
11
TC
+
-
SSR
NC1
Connection Diagram ( for PT244-T/K-W2C34 )
1
2
3
4
5
6
7
8
10
12
11
RTD1
SSR +
SSR
-
P
N
NO1
C1
NO2
C2
TC
230V
RTD2
RTD3
+
-
Connection Diagram ( for PT244-T/K-W*C34 )
1
2
3
4
5
6
7
8
10
12
11
RTD1
SSR +
SSR
-
NO1
C1
NO2
C2
TC
RTD2
RTD3
+
-
+
-
Power
Supply
*
*
12Vac/dc or 24V ac/dc on request
1
3
4
5
6
7
Control1 set point.
Sets the type of input sensor .
Sets input correction.
Sets the lower limit of PV input.
Sets the upper limit of PV input.
Sets the dwell time.
Level1 Parameter
2
Control2 set point.
Index
Sr.
No.
Para.
Description
User Interface
Technical Specification
Initial display when Power is ON
Parameter setting mode
Working
Input types & Input range
Set mode
Sets cycle time for PID action.
Sets proportional band.
Sets integration time.
Sets differential time.
Sets the
hysteresis
1
Runs auto tuning.
Sets control action for relay1 / SSR.
8
9
10
Sets control action for relay2. (for 2 Relay)
Sets the hysteresis2. (for 2 Relay)
Sets the alarm type. (for 2 Relay)
Sets AL1 icon as alarm relay. (for 2 Relay)
11
12
13
14
15
16
17
Factory reset parameter.
18
19
20
Sets Control1 output.
Lock keypad.
21
LED Indications
Alarm Types
Level2 Parameter
Error Messages
Pro-key (On-request)
Ordering Information
To enable Dwell timer.
Low temperature limit. (for 1 Relay)
High temperature limit. (for 1 Relay)
22
23
24
Sr.
No. Description
Process Value (PV)
RUN mode : Displays current measured value.
SETTING mode : Displays parameter.
Set value (SV)
RUN mode : Displays set value.
Displays countdown time when Dwell timer is
running.
SETTING mode : Displays set value of parameter.
Turns ON while control output1 is ON.
4
2
1
Displays the Temperature unit.
3
User Interface
4
7
6
1
12
5
3
2
8
9
10
11
13
PV
SV
PT244-T
8
Turns ON while control output2 is ON.
(for two relay)
Turns ON when auto tuning is in progress.
5
7
Flashes during Dwell timer is in progress.
Continuous ON : Dwell time elapsed.
Turns ON when the corresponding alarm out turns
ON.
6
9
Turns ON when keypad is locked.
10
Next key :
Used to enters parameters level, moves to next
parameters.
Press & hold this key atleast 2 seconds to enter
in set mode.
Press & hold this key atleast 4 seconds to enter
in Level1 Parameters.
Press & hold this key atleast 6 seconds to enter
in Level2 Parameters.
11
Down
Used in Program mode to decrement parameter
value.
Used to reset the Dwell timer..
/ Reset Key :
13
Up / AT Key :
value.
Press this key for 2 seconds to start or stop auto-
tuning.
Used in Program mode to increment parameter
12
Exit Key :
Press this key to save the setting value and to exit
the programing mode.
Input types & Input range
Input Type
Thermocouple
J
K
1
Decimal
Point
1
Display
O
Input Range ( C)
O
-50 to 750 C
O
-50 to 1200 C
RTD
Pt
100
1
0.1
O
-99 to 400 C
O
-99.9 to 400.0 C
The Auto-tuning function automatically computes and sets the
proportional band (P), Integral time (I), Derivative time (D) as
per process characteristics.
While Auto-tune is in progress
"AUTO"
led will turn ON.
After Auto-tuning is complete the
"AUTO"
led will turn OFF.
If auto -tuning is not complete after 3-4 cycles, it is suspected to
fail. In this case, check the wiring & parameters such as the
control action, input type etc.
Carry out the auto-tuning again, if there is a change in setpoint
or process parameters.
PID-time proportional
with auto reset & rate
Working
2. ON/OFF control action (For reverse mode)
The relay is ‘ON’ up to the set temperature and cuts”OFF”
above the set temperature . As the temperature of the system
drops ,the relay is switched ‘ON’ at a temperature lower than
the set point .
HYSTERESIS:
The difference between the temperature at which relay
switches ‘OFF’ is the hysteresis or dead band.
1. Auto tuning
Note : In Auto Tuning running time, user can not change
the parameter value.
1. PT244-T-W2C34 / PT244-K-W2C34 - Two Relay
2. PT244-T-W2C30AA - Single Relay
3. PT244-T-W2C30 / PT244-K-W2C30 - Single Relay
4. PT244-T-W5C34 / PT244-K-W5C34 - Two Relay
Model Description
Technical Specification
Housing
:
Polycarbonate Plastic
Dimensions
:
Frontal : 48 X 48mm, Depth : 78mm
Panel Cutout
:
45.5 X 45.5mm
Mounting :
Flush panel mounting with fasteners.
Protection
:
IP65 Front
Connections
:
Terminal connectors.
<
2.5sq mm terminal only.
Display :
4 X 17mm 7 segment Red/White display,
4 X 8mm 7 segment Green display
7 Iconic LEDs for Indication
Data storage
:
Non-volatile flash memory
Operating temp. :
0°C to 60°C (non-condensing)
Operating humidity :
20% to 85% (non-condensing)
Storage temp :
-25°C to 60°C (non-condensing)
Power input
:
230 Vac ±15 % , 50/60Hz Standard.
85 to 265Vac, 12/24Vdc on request.
Control output : (For all PT244-T- / PT244-K)
Relay :
5A, 230V AC (Res.) or
SSR (field selectable) : 10V DC, 30mA
Except -
(For PT244-T-W2C30 / PT244-K-W2C30)
Relay :
10A, 230V AC (Res.) or
SSR (field selectable) : 10V DC, 30mA
(For PT244-T-W2C30AA)
Relay :
16A, 230V AC (Res.) or
SSR (field selectable) : 10V DC, 30mA
Auxiliary output : (For all PT244-T / PT244-K)
Relay :
5A, 230V AC (Res.)
Input Type
:
RTD : Pt100
Thermocouple : J, K
O
O
Resolution
:
0.1 C / 1 C for RTD (Pt100) input
O
1 C for Thermocouple (J, K) input
O
Display Accuracy:
RTD : 0.1% of F.S +/- 1 C
Thermocouple : 0.3% of F.S
(20 min of settling time for TC)
Sampling Period :
1 second
When power is On, entire display part will flash for
3 sec, software version will flash for 3 sec and then enter in to
RUN mode.
Initial Display when Power is ON
1. Entire display Part
2. Run Mode
Parameter Setting Mode
Function: To set control1 set point.
1
Parameter
SET MODE
This parameter is prompted only if Relay 2 is configured in
,
1. As absolute auxiliary control or as an alarm (High/Low)
mode.
2. As deviation auxiliary control or as a deviation alarm mode.
Note: If set to OFF, will not be shown in the SP
setting.
Function: To set control2 set point.
(For 2 Relays)
2
Parameter
Min
Max
Fac.
O
0 C
Press & hold key for 2 second.
Display will show .
UP/ DOWN keys. Holding the key, will change the value at a
faster rate. Press key to store the desired value & move
on to the next parameter.( For 2 relays / Dwell). Set
value also can be stored by pressing Key
User can change value using
Min
Max
Fac.
O
0 C
Function: Sets input correction.
5
Parameter
Min
Max
Fac.
In time it may be possible that the display may be offset by a
degree or so.
To compensate for this error, user may need to add or minus
the degrees required to achieve the correct temperature.
O
Example :
The temperature on the display is 28 C, whereas
O
the actual temperature is 30 C. User will have to set the " "
O
parameter to 2 C, which means that once out of the
O
programming mode, the temperature on display will be 30 C
O
O
(28 C+ 2 C).
O
-20 C
O
20 C
O
0 C
LEVEL1 Parameter
Press & hold key for 4 seconds to enter into Level1
parameter setting( will flash).
When release the key, will flash.
Press
UP/DOWN
keys to modify the set value and to go to the
next parameter by pressing key.
Press the key to save the set value and to come out of
parameter setting after changing the set value.
Function: Sets the type of input sensor .
4
Parameter
Min
Max
Fac.
For J type sensor
For type of input sensor & range please refer
"Input types
& Input range"
table.
While changing the sensor type , , , , ,
, parameters of level1 will reset accordingly.
Function: Sets the dwell time.
3
Parameter
Min
Max
Fac.
9999
min
This parameter is prompted only if Relay 2 is configured in
as " "
.
This parameter is prompted only if parameter in is
configured as .
(Only for Single Relay)
For dwell timer operation please refer Working section.
Note:
1) Countdown timer is displayed on the lower display. Once
total time elapsed lower display will show " ".
(Not applicable for PT244-K)
2) DWL icon LED blinking indicates that dwell timer is in
progress. It switches to continuous ‘ON’ when dwell
timer is over.
3) If Dwell time programmed as OFF, it will disable the dwell
timer.
4) When soak in progress & dwell time is modified, new
dwell time is applicable .
5) The dwell period can be reduced or increased when the
timer is running. if it is reduced to meet the time elapsed.
the timer will change to the end state.
6) Once the timer output was energized it can be reset with
the Reset key.
A dwell timer is used to control a process at a fixed temperature
for a defined period. Once the process reaches the setpoint,
dwell timer starts to count until time out . After the time
completes, control output goes OFF and auxiliary output
energises as an alarm.
3. Dwell Timer :
Settings
=
= min
10min
