Omni 48+ Dual Setpoint Temperature Controller

Omni+ Dual Setpoint Temperature Controller with Programmable

Input & TIMER

Product Information:

The Omni+ Dual Setpoint Temperature Controller is an advanced
controller with programmable input and timer. It comes in four
different models: Omni 48+, Omni 72+, Omni 96+, and OmniX+. The
controller has a panel mounting feature and electrical connections
for easy installation. It can accept Thermocouples (J & K Type)
and RTD Pt100 and has output 2 function parameters, control
parameters, supervisory parameters, operator parameter, and soak
timer parameters.

Product Usage Instructions:

Section 1: Panel Mounting and Electrical Connections

WARNING: Mishandling or negligence can result
in personal death or serious injury.

Panel Cutouts:

• Omni 48+: 45 X 45 mm -0, +0.5 mm
• Omni 72+: 68 X 68 mm -0, +0.5 mm
• Omni 96+: 92 X 92 mm -0, +0.5 mm

Panel Mounting:

1. Prepare a square cutout to the size shown in Figure 1.1
   depending on the model (OmniX48+, OmniX72+, OmniX96+).

2. Remove the Panel Mounting Clamp from the controller
   Enclosure.

3. Insert the rear of the controller housing through the panel
   cutout from the front of the mounting panel.

4. Hold the controller gently against the mounting panel such that
   it positions squarely against the panel wall.

5. Slide the mounting clamp forward until it is firmly in contact
   with the rear face of the mounting panel and the tongues of the
   clamp engage in the ratchets on the controller enclosure. Ensure
   that the clamp springs push firmly against the rear face of the
   mounting panel for secured mounting.

Electrical Connections:

Observe the following while making electrical connections:

1. Run power supply cables separated from Thermocouple / RTD
   cables.

2. Use appropriate fuses and switches, wherever necessary, for
   driving the high voltage loads.

3. Do not over-tighten the terminal screws while making
   connections.

4. Switch-off the controller supply while making / removing any
   connections.

The Electrical Connection Diagram is shown on the Right Side of
the controller enclosure. The diagram shows the terminals viewed
from the REAR SIDE with the controller label upright. The terminal
numbers are also embossed on the rear side of the controller. Refer
Figure1.2(a) for model OmniX48+, Figure1.2(b) for model OmniX72+
and Figure1.2(c) for model OmniX96+.

Input (Terminals 1, 2 and 3):

The controller accepts Thermocouples (J & K Type) and RTD
Pt100. Connect Thermocouple or RTD Pt100 as described below:

Thermocouple:

Connect Thermocouple Positive (+) to terminal 1 and Negative (-)
to terminal 2 as shown in Figure 1.3 (a). Use correct type of
extension lead wires or compensating cable. Avoid joints in the
cable.

Omni +

Dual Setpoint Temperature Controller with Programmable Input & TIMER

Omni 48+
TMR

Omni 72+
TMR

Omni 96+
TMR

User Manual

OmniX+
CONTENTS
1. PANEL MOUNTING & ELECTRICAL CONNECTIONS 2. FRONT PANEL : LAYOUT AND OPERATION 3. SET UP MODE : ACCESS AND OPERATION 4. INPUT/OUTPUT CONFIGURATION PARAMETERS : PAGE-12 5. OUTPUT 2 FUNCTION PARAMETERS : PAGE-11 6. CONTROL PARAMETERS : PAGE-10 7. SUPERVISORY PARAMETERS : PAGE-13 8. OPERATOR PARAMETER : PAGE-0 9. SOAK TIMER PARAMETERS : PAGE-15

User Manual
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User Manual

Section 1 PANEL MOUNTING AND ELECTRICAL CONNECTIONS

WARNING
MISHANDLING / NEGLIGENCE CAN RESULT IN PERSONAL DEATH OR SERIOUS INJURY.

PANEL CUTOUTS

Figure 1.1

Omni 48+
Panel Cutout
45 X 45 mm -0, +0.5 mm

Omni 72+
Panel Cutout
68 X 68 mm -0, +0.5 mm

PANEL MOUNTING

Follow the steps below for mounting the controller on panel:

Omni 96+
Panel Cutout
92 X 92 mm -0, +0.5 mm

1. Prepare a square cutout to the size shown in Figure 1.1 depending on the model (OmniX48+, OmniX72+, OmniX96+).

2. Remove the Panel Mounting Clamp from the controller Enclosure.

3. Insert the rear of the controller housing through the panel cutout from the front of the mounting panel.

4. Hold the controller gently against the mounting panel such that it positions squarely against the panel wall.

5. Slide the mounting clamp forward until it is firmly in contact with the rear face of the mounting panel and the tongues of the clamp engage in the ratchets on the controller enclosure. Ensure that the clamp springs push firmly against the rear face of the mounting panel for secured mounting.

ELECTRICAL CONNECTIONS

Observe the followings while making electrical connections.

1. Run power supply cables separated from Thermocouple / RTD cables.

2. Use appropriate fuses and switches, wherever necessary, for driving the high voltage loads.

3. Do not over-tighten the terminal screws while making connections.

4. Switch-off the controller supply while making / removing any connections .

The Electrical Connection Diagram is shown on the Right Side of the controller enclosure. The diagram shows the terminals viewed from the REAR SIDE with the controller label upright. The terminal numbers are also embossed on the rear side of the controller. Refer Figure1.2(a) for model OmniX48+, Figure1.2(b) for model OmniX72+ and Figure1.2(c) for model OmniX96+.

Figure 1.2(a)

Figure 1.2(b)

Figure 1.2(c)

LN
85 ~ 265 V AC Supply

OP-1 (Control) C NO RELAY + – SSR

OP-1 (Control) NC C NO RELAY
+ – SSR

OP-1(Control) C NO RELAY
SSR

RELAY NO C NC 85~265

5

10

4

9

3 Omni 48+ 8

2

7

1

6

SSR

LN

VAC

OP-2

-+

6

12

5

11

4

10

3 Omni 72+ 9

2

8

1

7

LN

OP-2

AC Supply

9

18

8

17

7

16

6

15

5 Omni 96+ 14

4

13

3

12

2

11

1

10

INPUT
T/C Pt100

RELAY NO C NC 85~265 V

SSR + RELAY NO C NC
OP-2

INPUT T/C Pt100

SSR + –

INPUT T/C Pt100

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User Manual

INPUT (Terminals 1, 2 and 3)

The controller accepts Thermocouples (J & K Type) and RTD Pt100. Connect Thermocouple or RTD Pt100 as described below.

Thermocouple
Connect Thermocouple Positive (+) to terminal 1 and Negative (-) to terminal 2 as shown in Figure 1.3 (a). Use correct type of extension lead wires or compensating cable. Avoid joints in the cable.

Figure 1.3(a)
3 2 1

RTD Pt100, 3-wire
Connect single leaded end of RTD bulb to terminal 1 and the double leaded ends to terminal 2 and 3 (interchangeable) as shown in Figure 1.3 (b). Use copper conductor leads of very low resistance for RTD connections. Ensure that all 3 leads are of the same gauge and length. Avoid joints in the cable.

Figure 1.3(b)
3 2 1

OUTPUT 1
The Output-1 (Control Output) is factory supplied as either Relay contacts or SSR Drive Voltage, as per Ordering Codes. The Terminals for Relay and SSR output (for all 3 models) are shown in the Figures 1.4 (a) & 1.4 (b), respectively.

Relay

Omni 48+

N/C

8

C

7

N/O

6

Figure 1.4(a)

Omni 72+

N/C

9

C

8

N/O

7

Omni 96+

N/C 12

C

11

N/O 10

N/O (Normally Open), C (Common), N/C (Normally Closed) contacts are potential- free and are rated 10A/240 VAC (resistive load).

SSR Drive Voltage

Omni 48+
5 4

Figure 1.4(b)
Omni 72+
6 5

Omni 96+
9 8

Controller outputs 12 VDC @ 40mA pulses for driving external SSR. Connect Terminal marked (+) to positive SSR Terminal and Terminal marked (-) to negative SSR Terminal.

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OUTPUT- 2
The Output-2 is factory supplied as either Relay contacts or SSR Drive Voltage, as per Ordering Codes. The Terminals for Relay and SSR output (for all 3 models) are shown in the Figures 1.5 (a) & 1.5 (b), respectively.

Relay

Omni 48+

Figure 1.5(a) Omni 72+

Omni 96+

N/C

8

C

7

N/O

6

N/C

9

C

8

N/O

7

N/C

12

C

11

N/O

10

SSR Drive Voltage Omni 48+
7 6

Figure 1.5(b) Omni 72+
8 7

Omni 96+
11 10

POWER SUPPLY

Omni 48+

N 10

L

9

Figure 1.6 Omni 72+

N

11

L

10

Omni 96+

N 18

L

17

The controller accepts single phase, 50/60 Hz Line Voltage ranging from 85 to 264 VAC. Use well-insulated copper conductor wire of the size not smaller than 0.5 mm2 for power supply connections. Connect Line Voltage as shown in
Figure 1.6.

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Section 2 FRONT PANEL : LAYOUT AND OPERATION

Figure 2.1(a) : Omni 48+

PPI

Omni 48+

Timer status

Indicator

TMR

Output 1 status

Indicator

OP1

OP2

PAGE Key

Upper Readout
Lower Readout
Output 2 status Indicator ENTER Key

DOWN Key

UP Key

User Manual

Timer Status Indicator
Output 1 Status Indicator
PAGE Key

Figure 2.1(b) : Omni 72+

PPI

Omni 72+

OP1

TMR

OP2

Upper Readout
Lower Readout
Output 2 Status Indicator ENTER Key

DOWN Key

UP Key

Figure 2.1(c) : Omni 96+

PPI

Omni 96+

Timer Status Indicator
Output 1 Status Indicator
PAGE Key

OP1

TMR

OP2

Upper Readout
Lower Readout
Output 2 Status Indicator ENTER Key

DOWN Key

UP Key

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READOUTS
The Upper Readout is a 4 digit, 7-segment bright red LED display and usually displays the Measured Temperature. In Set-up Mode, the Upper Readout displays parameter values/options.
The Lower Readout is a 4 digit, 7-segment bright green LED display and usually displays SP (Control Setpoint) or % Output Power. In Set-up Mode, the Lower Readout displays prompts for the parameters.

INDICATOR

The Table 2.1 below lists the three front panel indicators (identified by the Front panel legend) and the associated status. Table 2.1

Indicator

Function

OP1

Indicates Output-1 ON/OFF status.

OP2

Y Flashes if OP-2 is configured as Alarm and if alarm is active. Y Indicates ON/OFF status if OP-2 is configured as Auxiliary Control.

TMR

Y Flashes while the Soak Timer is counting down.
Y Glows steadily while the Soak Timer is outside the Timer Start Band or Hold Band (that is, HOLD state).

KEYS
There are four tactile keys provided on the front panel for configuring the controller and setting-up the parameter values. The Table 2.2 lists each key (identified by the front panel symbol) and the associated function.

Symbol

Key PAGE DOWN
UP ENTER

Table 2.2

Function

Press to enter / exit Set-up mode.

Press to decrease the parameter value. Pressing once decreases the value by one count; holding the key pressed speeds up the change.
Press to increase the parameter value. Pressing once increases the value by one count; holding the key pressed speeds up the change.
Press to store the set parameter value and to scroll to the next parameter.

POWER UP

Upon switching on the power to the controller, all displays and indicators are lit on for approximately 3 seconds. This is followed

by the indication of the model name

on the Lower Readout and

on Upper Readout.

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MAIN DISPLAY
After the Power-up display sequence, the controller enters MAIN Display Mode. The Upper Readout shows the measured Temperature Process Value and the Lower Readout displays the SP (Control Setpoint). The MAIN Display Mode is the one that shall be used most often.
If the controller is configured to operate in PID Control Mode; the Lower Readout can be toggled to indicate either SP or % Output Power using the ENTER Key. The default Lower Readout upon Power-up is SP. While indicating % Power, the left most digit indicates P and remaining digits indicate power value.

ADJUSTING SP The SP value can be directly adjusted on the Lower Readout while the controller is in the MAIN Display Mode and the Lower readout is showing SP value. Step through the following sequence to adjust the SP value:
1. Press and release UP/DOWN key once. The Lower Readout starts flashing.
2. Use UP/DOWN keys to adjust the SP value.
3. Press and release ENTER key. The Lower Readout stops flashing and the set value is registered and stored in the controller’s non-volatile memory.

Figure 2.2

Measured Temperature SetPoint (SP) MAIN Display Mode

or
Lower Readout Flashes

MAIN Display Mode

Adjust value on Lower Readout using
UP/DOWN keys

Press ENTER key to store the
new SP Value

Timer (Soak) Mode Indication
If the soak timer is enabled, the Start command can be issued by either setting the parameter “Start” on page 0 to `Yes’ or by pressing the Enter key for approximately for 3 seconds while in Main Mode.
Upon issuing Start command the lower readout immediately Starts showing Balance Soak Time. Use Enter key to toggle the lower readout to show either Setpoint or % output power or Balance Soak Time.

TEMPERATURE ERROR INDICATION
In case the Temperature falls below the Minimum Range or rises above the Maximum Range specified for the selected `Input Type’ or in case the input sensor is open / broken; the Upper Readout flashes the error messages listed in Table 2.3 below. The Figure 2.3 illustrates an open sensor condition.

Figure 2.3

PPI

Omni 48+

TMR OP1

OP2

Table 2.3

Message

PV Error Type
Over-range (Temperature above Max. Range)
Under-range (Temperature below Min. Range)

Open (Sensor open / broken)

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User Manual

TUNE INDICATION (Applicable for PID Control Only)
Upon issuing `Self Tune Command’, the controller starts tuning itself to the process under control. While the controller is busy in Tuning itself to the process, the Lower Readout flashes the message “Tune”, as shown in figure 2.4 below. The user is advised not to disturb the process or alter any parameter values while the “Tune” message is being flashed. The “Tune” message automatically disappears upon completion of Tuning procedure and the controller reverts to MAIN Display Mode.

Figure 2.4

PPI

Omni 48+

TMR OP1

OP2

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User Manual

Section 3 SET-UP MODE : ACCESS AND OPERATION
The controller requires various user settings that determine how the controller will function or operate. These settings are called Parameters.
For the convenience and ease of operation, the various parameters have been grouped separately depending upon the functions they define. Each such group is called a PAGE. Each PAGE is assigned a unique number, called PAGE NUMBER, for its access. The parameters contained in a PAGE are presented in a fixed sequence to the user for setting. The user can access a desired PAGE by entering its PAGE NUMBER and can select and set the desired parameter values.
PARAMETER PROMPTS
Each parameter has an identifying tag, called the Parameter Prompt. While setting parameter values in a PAGE, the parameter prompt is always displayed on the Lower Readout and its current value is displayed on the Upper Readout.
ACCESSING A PAGE
Each PAGE is accessible only from the MAIN Display Mode. That is, from the current PAGE, the user must return to the MAIN Display Mode before the other PAGE can be accessed.
Figure 3.1 illustrates access to the desired PAGE from MAIN Display Mode.
Figure 3.1

or

MAIN Display Mode

Default Page

Page Number

First Parameter on PAGE-12

Press PAGE key to enter Set-up mode

Use UP/DOWN keys to set
Page Number

Press ENTER key to open the Page

ADJUSTING PARAMETER VALUES For accessing and adjusting the parameter, one must first open the PAGE containing the parameter.
Figure 3.2 illustrates how to access the desired parameter(s) and adjust the corresponding value(s). The example shows accessing the parameter Control Logic’ and changing its value fromReverse’ to `Direct’. Press PAGE key to revert to MAIN Mode.
Figure 3.2

First Parameter on PAGE-12

or

Next Parameter on PAGE-12

New Parameter value

Next Parameter on PAGE-12

Keep pressing ENTER Key to select
desired parameter

Use UP/DOWN keys to set the value to dir Logic

Press ENTER key to store the value & move to next parameter

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PARAMETER LOCKING For protecting the parameter values from unauthorized / accidental alterations, the parameter adjustments can be Locked. The Operator Page is not affected by locking. Locking Follow the steps below to apply Locking when the controller is unlocked.
1. Press and release PAGE key while the controller is in the MAIN Display Mode. The Lower Readout shows PAGE and the Upper Readout shows 0.
2. Use UP / DOWN keys to set the Page Number to 123 on the Upper Readout.
3. Press and release ENTER key. The controller returns to the MAIN Display Mode with the Lock enabled. The Figure 3.3 illustrates the steps for Locking.
Figure 3.3

MAIN Mode

or

Default Page

Locking Code

MAIN Mode

Press PAGE key to enter Set-up mode

Use UP/DOWN keys to set the `Locking’ Code

Press ENTER key to Lock & Return to
MAIN Mode

Un-Locking For Un-Locking, repeat the sequence of steps shown in figure 3.3 twice.

SETTING DEFAULT VALUES The controller is shipped from the factory with all the parameters set to their default values. Refer Figure 3.4 above for regaining the factory default values.
Figure 3.4

MAIN Mode

or

Default Page

Default Code

MAIN Mode

Press PAGE key to enter Set-up Mode

Use UP/DOWN keys to set the `Default’ Code

Press ENTER key. Controller resets and restarts with default parameter values

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User Manual

Section 4 INPUT / OUTPUT CONFIGURATION PARAMETERS : PAGE-12

Refer Table 4.1 for the parameter descriptions and settings.

Table 4.1
Parameter Description
INPUT TYPE Select Input type in accordance with the type of sensor (Thermocouple or RTD) connected for temperature measurement.
CONTROL LOGIC Reverse Heating Control (Output Power decreases with increase in Temperature). Direct Cooling Control (Output Power increases with increase in Temperature).
SETPOINT LOW Sets minimum permissible control setpoint value.
SETPOINT HIGH Sets maximum permissible control setpoint value.
OFFSET FOR MEASURED TEMPERATURE This value is algebraically added to the measured Temperature to derive the final temperature that is displayed and compared for alarm / control. Final Temperature = Measured Temperature + Offset
DIGITAL FILTER This value determines the averaging rate of measured temperature and thus helps removing undesired fast changes in the measured temperature. The higher the value the better the averaging but the slower the response to actual changes. The default value, 1.0 Second, is appropriate in most cases.

Settings (Default Value) Refer Table 4.2 for various available ‘Input Types’ along with their respective Ranges and Resolutions. (Default : Type K)
Reverse Direct (Default : Reverse)
Min. Range to Setpoint High for the selected Input type
(Default : Min. Range for the Selected Input Type)
Setpoint Low to Max. Range for the selected Input type (Default : Max. Range for the
Selected Input Type)
-1999 to 9999 or -199.9 to 999.9
(Default : 0)
0.5 to 25.0 Seconds (in steps of 0.5 Seconds)
(Default : 1.0)

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Parameter Description
OUTPUT-2 FUNCTION SELECTION
This parameter configures Output (OP2) as;
None Disables Output-2, that is, keeps Off.
Alarm Output-2 activates in accordance to Alarm settings.
Control Output-2 activates in accordance to Auxiliary Control settings.
Blower Output-2 activates in accordance to Blower / Compressor Control settings.
Soak Time Output Output-2 remains energized during Soak Time execution, if Soak Timer function is enabled.

Settings (Default Value)
None Alarm Control Blower Soak Time Output (Default : None)

Option

Table 4.2

What it means Type J Thermocouple Type K Thermocouple 3-wire, RTD Pt100 3-wire, RTD Pt100

Range (Min to Max) 0 to +960°C
-200 to +1375°C -199 to +600°C -199.9 to +600.0°C

Resolution 1°C 1°C 1°C 0.1°C

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Section 5 OUTPUT-2 FUNCTION PARAMETERS : PAGE-11

Refer Table 5.1 for the parameter descriptions and settings.

Table 5.1
OP2 Function : Alarm
Parameter Description
ALARM TYPE
Sets the Alarm type;
Process Low The alarm activates for Temperature less than or equal to Alarm Setpoint.
Process High The alarm activates for Temperature greater than or equal to Alarm Setpoint.
Deviation Band The alarm activates if the Temperature deviation from SP is greater than the set positive or negative Deviation Band’ value. Window Band The alarm activates if the Temperature deviation from SP is greater than the setWindow Band’ value in either direction.
End Of Soak The OP2 Relay / SSR is switched ON for the time duration set for the parameter `Alarm Timer’.
ALARM INHIBIT No Alarm is not suppressed for start-up condition.
Yes The Alarm activation is inhibited (suppressed) until the Temperature is found within alarm limits from the time the controller is switched ON.
ALARM LOGIC Normal The Alarm output (Relay/SSR) remains ON under alarm condition; OFF otherwise. Useful for Audio / Visual Alarm.
Reverse The Alarm output (Relay / SSR) remains OFF under alarm condition; ON otherwise. Useful for Tripping the system under control.

Settings (Default value)
Process Low Process High Deviation Band Window Band End of Soak (Default : Process Low)
Yes No (Default : Yes)
Normal Reverse (Default : Normal)

ALARM TIMER
Available for End of Soak Alarm. Sets time duration in seconds for which the alarm shall activate upon End of Soak Timer.

5 to 250 (Default : 10)

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OP2 Function : Control
Parameter Description
HYSTERESIS This parameter value sets a differential (dead) band between the ON and OFF control states. Keep it large enough to avoid frequent switching of the load without losing the desired control accuracy.
CONTROL LOGIC Normal The Output remains ON for Temperature below Setpoint and OFF otherwise.
Reverse The Output remains ON for Temperature above Setpoint and OFF otherwise.
OP2 Function : Blower
BLOWER / COMPRESSOR HYSTERESIS This parameter value sets a differential (dead) band between the blower ON and OFF states. Keep it large enough to avoid frequent switching of the load without losing the desired control accuracy.
BLOWER / COMPRESSOR TIME DELAY
This parameter is mainly used for Compressor Load. For compressor switching it is desired that once the compressor is switched OFF, there must be some time delay before it is switched ON again. The switching ON of the compressor should therefore take place only if both the conditions, that is; the time delay is elapsed and PV is above the Setpoint, are satisfied.
The `Time Delay’ parameter allows the user to set the optimum time delay that ensures both, the enhanced compressor life and the desired control accuracy.
Set this parameter value to zero if no time delay is required.

Settings (Default value)
1 to 999 or 0.1 to 99.9 (Default : 2 or 0.2)
Normal Reverse (Default : Normal)
1 to 250 or 0.1 to 25.0 (Default : 2 or 0.2)
0 to 600 Sec. (in steps of 0.5 Sec.)
(Default : 0)

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Section 6 CONTROL PARAMETERS : PAGE-10

Refer Table 6.1 for the parameter descriptions and settings.

Table 6.1
Parameter Description
CONTROL MODE Select appropriate Control Algorithm suited for process requirement.
On-Off The control algorithm tends to maintain the Temperature at SP by either switching the output fully OFF or fully ON. The On and Off switching is differentiated by the user settable Hysteresis’. PID The control algorithm uses a 2nd order equation to compute the% Output Power’ required to maintain the Temperature at SP. The constants P, I, D are automatically set by the controller by issuing Self-Tune command.
HYSTERESIS (For On-Off Control only) Sets differential (dead) band between On- Off switching of the control output (Relay/SSR).
COMPRESSOR TIME DELAY (For On-Off Control only) This parameter is mainly used for Compressor Load. For compressor switching it is desired that once the compressor is switched OFF, there must be some time delay before it is switched ON again. The switching ON of the compressor should therefore take place only if both the conditions, that is; the time delay is elapsed and PV is above the Setpoint, are satisfied.
Set this parameter value to zero if no time delay is required.
CYCLE TIME (For PID Control only) For time-proportionating PID control, the output power is implemented by adjusting the ratio of ON : OFF time of a fixed time interval, called `Cycle Time’.
Larger Cycle Time ensures longer Relay/SSR life but may result in poor control accuracy and vice-a-versa. The recommended Cycle Time values are; 20 sec. for Relay and 1 sec. for SSR .

Settings (Default Value)
On-Off PID (Default : PID)
1 to 999 or
0.1 to 99.9 (Default : 2 or 0.2)
0 to 600 Sec. (in steps of 0.5 Sec.)
(Default : 0)
0.5 to 120.0 Seconds (in steps of 0.5 Seconds)
(Default : 20.0 Sec)

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Parameter Description
PROPORTIONAL BAND (For PID Control only)
The Proportional Band is defined in terms of process value deviation from the setpoint (also known as process error). Within the band the output power is varied from maximum (100%) at maximum deviation to minimum (0%) at minimum deviation. The process value thus tends to stabilize at a point within the band where the power input equals losses. Larger Band results in better stability but larger deviation.
The Proportional Band value is automatically calculated by controller’s Self- Tune feature and seldom requires any manual adjustments.
INTEGRAL TIME (For PID Control only) The application of proportional band alone results in process value stability within the band but away from the setpoint. This is called steady state Offset Error. The integral action is incorporated for automatic removal of offset error with minimum oscillations.
The Integral Time value is automatically calculated by controller’s Self-Tune feature and seldom requires any manual adjustments.
Setting the value 0 cuts-off Integral action.
DERIVATIVE TIME (For PID Control only) It is desired that the controller should respond to any dynamic changes in the process conditions (like variations in load, power supply fluctuations, etc.) fast enough so as to retain the process value near the setpoint. The Derivative Time determines how strong the output power will change in response to the rate of change of measured PV.
The Derivative Time value is automatically calculated by controller’s Self- Tune feature and seldom requires any manual adjustments.
Setting the value 0 cuts-off Derivative action.

User Manual
Settings (Default Value)
0.1 to 999.9 (Default : 10.0)
0 to 1000 Seconds (Default : 100 Sec)
0 to 250 Seconds (Default : 25 Sec)

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Section 7 SUPERVISORY PARAMETERS : PAGE-13

Refer Table 7.1 for the parameter descriptions and settings.
Table 7.1
Parameter Description
SELF-TUNE COMMAND Set this parameter to YES to activate Tuning’ operation. Select as NO if, for any reason, theTuning’ operation in progress is to be aborted.
OVERSHOOT INHIBIT ENABLE / DISABLE Set this parameter to Enable’ if the process exhibits unacceptable overshoot upon start-up or a step change in SP. If Enabled, the controller monitors and controls the rate of change of Temperature in order to minimize or eliminate overshoot. OVERSHOOT INHIBIT FACTOR This parameter is available only ifOvershoot Inhibit’ is enabled. Adjust this parameter value to improve the effectiveness of the controller’s Overshoot Inhibit feature. Increase the value if the overshoot is curbed but the Temperature takes too long to reach the SP. Decrease the value if the overshoot persists.
OP2 SETPOINT EDITING PERMISSION ON OPERATOR PAGE The OP2 Setpoint is available on operator page (PAGE 0) for view and adjustment. The adjustment, can be locked by setting this parameter value to Disable’. Locking protects the SP from any inadvertent changes. SOAK ABORT COMMAND ON OPERATOR PAGE This parameter allows the user to enable (permit) or disable (restrict) the issuance ofAbort’ command from operator page to Abort (Stop) the running Soak Timer.
SOAK TIME ADJUSTMENT ON OPERATOR PAGE This parameter allows the user to enable (permit) or disable (restrict) the adjustment of the `Soak Time Duration’ on operator Page.

Settings (Default Value)
No Yes (Default : No)
Disable Enable (Default : Disable)
1.0 to 2.0 (Default : 1.2)
Disable Enable (Default : Enable)
Disable Enable (Default : Enable)
Disable Enable (Default : Enable)

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Section 8 OPERATOR PARAMETER : PAGE-0
Refer Table 8.1 for the parameter descriptions and settings. Table 8.1

Parameter Description
SOAK START COMMAND (Available only if Soak Timer is enabled)
Set to Yes’ to start soak timer. Not available if timer already running. SOAK ABORT COMMAND (Available only if Soak Timer is enabled) Set toYes’ to abort a running timer. Available if timer is running.
SOAK TIME (Available only if Soak Timer is enabled)
The set time value for the soak timer in the selected time units.
ALARM SETPOINT (Available if OP-2 function is Alarm) Available only if selected Alarm Type’ is eitherProcess High’ or Process Low’. This parameter value sets the Upper (Process High) or Lower (Process Low) Alarm Limit. ALARM DEVIATION (Available if OP-2 function is Alarm) Available only if selectedAlarm Type’ is Deviation Band’. This parameter value can be set as Negative (-) or Positive (+) and gets added to the Control Setpoint (SP) to define either Process Low (negative deviation band) or Process High (positive deviation band) Alarm Limit. ALARM BAND (Available if OP-2 function is Alarm) Available only if selected Alarm Type’ is `Window Band’. This parameter value gets subtracted from the Control Setpoint (SP) to define Process Low and added to the Control Setpoint (SP) to define the Process High Alarm Limit.

Settings (Default value)
No Yes (Default : No)
No Yes (Default : No)
00.05 to 60.00 MM:SS or
00.05 to 99.55 HH:MM or
1 to 999 Hours (Default : 3 or 0.3) Minimum to Maximum Range specified for the selected Input Type
(Default : 0)
-1999 to 9999 or -199.9 to 999.9 (Default : 3 or 0.3)
3 to 999 or 0.3 to 99.9 (Default : 3 or 0.3)

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Parameter Description
AUXILIARY CONTROL SETPOINT (Available if OP-2 function is Control)
This parameter value sets an offset to the Control Setpoint (SP) to define another (Auxiliary) setpoint either above (positive value) or below (negative value) the SP.
BLOWER CONTROL SETPOINT (Available if OP-2 function is Blower)
This parameter value sets a positive (+) offset to the SP to define the Blower / Compressor Setpoint’. SETPOINT LOCKING This parameter allows locking the adjustment of the SP on Lower Readout in Main Display Mode. For Locking, set the parameter value to Yes’. This allows the operator to protect the SP from any unauthorized changes.

Settings (Default value)
(Min. Range – SP) to (Max. Range – SP)
(Default : 0)
0.0 to 25.0 (Default : 0)
Yes No (Default : No)

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Section 9 SOAK TIMER PARAMETERS : PAGE-15

Refer Table 9.1 for the parameter descriptions and settings.
Table 9.1
Parameter Description
TIMER ENABLE Yes Soak Timer function is enabled. No Soak Timer function is disabled.
TIME UNITS Select the time units for Soak Time Duration.
TIME DURATION The preset time value in selected units for the Soak Timer.
TIMER-START BAND After issuance of start command, the timer starts counting down once the Temperature enters the band around SP defined by this parameter value.
HOLDBACK STRATEGY None Temperature based timer pause is not required. Up Timer is paused if Temperature is outside holdband above SP. Down Timer is paused if Temperature is outside holdband below SP. Both Timer is paused if Temperature is outside holdband either above or below SP.
HOLD BAND Sets the temperature limit(s) with respect to the SP for the timer to pause. The timer stops counting down so long as the Temperature is outside this band value.

Settings Default Value
No Yes (Default : No)
Min:Sec Hours:Min Hours (Default : Min: Sec) 00.05 to 60:00 Min:Sec 00.05 to 99:55 Hrs:Min 1 to 999 Hours (Default : 00.10 Min:Sec)
0 to 9999 or 0.0 to 999.9 (Default : 5 or 0.5)
None Up Down Both (Default : None)
1 to 9999 or 0.1 to 999.9 (Default : 5 or 0.5)

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Parameter Description
CONTROL OUTPUT OFF AT TIMER END Yes The control output (OP1) is forced off upon completion of timer. No The control output state is not forced.
POWER-FAIL RECOVERY METHOD Continue The Soak Timer resumes operation for the balance time. Start The timer re-runs the complete soak time. Abort The timer operation is suspended until a new start command is issued.
Figure 9.1
SOAK TIMER OPERATION

Settings Default Value
No Yes (Default : No)
Continue (Re)Start Abort (Default : Continue)

PV

Start Band
SP

PV

PV enters start band,

Timer count down starts

Set Time

Time

Basic Operation
The Soak Timer is essentially a preset timer that can be configured to run as :
(a) A Free Running Timer by setting timer Start Band’ to 0. That is, the timer starts counting down immediately upon issuance of Start Command by the user and continues until set time is elapsed. (b) A Setpoint Dependent Timer. That is, after issuance of Start Command, the count down starts only after the PV reaches within timerStart Band’. The timer start band is a symmetrical band centered around the SP. For example, for a start band of 2°C and SP value of 100°C, the count down begins once the PV reaches a value within 98°C (SP Start Band) to102°C (SP + Start Band). Note that, once the PV enters Start Band’, the timer continues to run regardless of whether the PV remains within or outside theStart Band’.

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Hold Band Operation The timer is also provided with a Hold Band’ that can be enabled to make sure that the timer counts down only while the PV is within theHold Band’. That is, the timer pauses (holds counting down) whenever the PV is outside the Hold Band’. TheHold Band’ is set with respect to the SP and can be set above or below or above and below the SP. For example, a 5 °C Hold Band below the SP (say,100°C) will force the timer in pause state whenever the PV is equal or less than 95°C (SP – Hold Band).
Power-fail Recovery Modes The timer facilitates 3 different power-fail recovery modes, viz., Continue, Re-start and Abort. In Continue mode, the timer resumes to execute the balance soak time once the PV is detected within Hold Band. In Re-start mode, the timer executes the complete set time all over again. In Abort mode, the timer stops execution until a start command is issued.
End-of-Soak Events
The output Relay/SSR modules, OP2 and/or OP3, can be configured as End-of-Soak Alarm with a settable alarm duration. That is, upon completion of Soak Time execution, the Relay energizes (say, to activate a buzzer) for the set alarm duration.
Additionally, the controller provides `Output-Off’ strategy that can be enabled to force the control output OP1 off upon Endof-Soak. The output becomes active again after issuance of Start Command for the execution of a new Soak Time Cycle.

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Jan 2022

Process Precision Instruments
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