OmniX+ Dual Setpoint Temperature Controller with Programmable Input & TIMER
Brand: PPI
Manufacturer: Process Precision Instruments
Model Series: OmniX+
Models: OmniX48+, OmniX72+, OmniX96+
Document Type: User Manual
Section 1: PANEL MOUNTING & ELECTRICAL CONNECTIONS
WARNING: MISHANDLING / NEGLIGENCE CAN RESULT IN PERSONAL DEATH OR SERIOUS INJURY.
Panel Cutouts
Figure 1.1 describes the panel cutout dimensions for each model:
- OmniX48+: 45 x 45 mm (-0, +0.5 mm)
- OmniX72+: 68 x 68 mm (-0, +0.5 mm)
- OmniX96+: 92 x 92 mm (-0, +0.5 mm)
Panel Mounting
- Prepare a square cutout to the size shown in Figure 1.1 depending on the model (OmniX48+, OmniX72+, OmniX96+).
- Remove the Panel Mounting Clamp from the controller Enclosure.
- Insert the rear of the controller housing through the panel cutout from the front of the mounting panel.
- Hold the controller gently against the mounting panel such that it positions squarely against the panel wall.
- 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:
- Run power supply cables separated from Thermocouple / RTD cables.
- Use appropriate fuses and switches, wherever necessary, for driving the high voltage loads.
- Do not over-tighten the terminal screws while making connections.
- Switch-off the controller supply while making / removing any connections.
The Electrical Connection Diagram shows the terminals viewed from the REAR SIDE with the controller label upright. Terminal numbers are embossed on the rear side. Refer to Figure 1.2(a) for OmniX48+, Figure 1.2(b) for OmniX72+, and Figure 1.2(c) for OmniX96+.
Figure 1.2(a) OmniX48+ Terminals: INPUT (T/C, Pt100) terminals 1, 2, 3. OUTPUT-1 (Control) terminals: [OP1] C (7), N/O (6), N/C (8). OUTPUT-2 terminals: SSR + (4), SSR - (5). AC SUPPLY terminals: L (9), N (10).
Figure 1.2(b) OmniX72+ Terminals: INPUT (T/C, Pt100) terminals 1, 2, 3. OUTPUT-1 (Control) terminals: [OP1] C (8), N/O (7), N/C (9). OUTPUT-2 terminals: SSR + (5), SSR - (6). AC SUPPLY terminals: L (10), N (11).
Figure 1.2(c) OmniX96+ Terminals: INPUT (T/C, Pt100) terminals 1, 2, 3. OUTPUT-1 (Control) terminals: [OP1] C (11), N/O (10), N/C (12). OUTPUT-2 terminals: SSR + (8), SSR - (9). AC SUPPLY terminals: L (17), N (18).
Section 2: FRONT PANEL : LAYOUT AND OPERATION
Readouts
The Upper Readout is a 4-digit, 7-segment bright red LED display showing Measured Temperature or parameter values/options in Set-up Mode. The Lower Readout is a 4-digit, 7-segment bright green LED display showing SP (Control Setpoint), % Output Power, or parameter prompts in Set-up Mode.
Indicators
Table 2.1 lists front panel indicators and their status:
| Indicator | Function |
|---|---|
| OP1 | Indicates Output-1 ON/OFF status. |
| OP2 | Flashes if OP-2 is configured as Alarm and alarm is active. Indicates ON/OFF status if OP-2 is configured as Auxiliary Control. |
| TMR | Flashes while the Soak Timer is counting down. Glows steadily while the Soak Timer is outside the Timer Start Band or Hold Band (HOLD state). |
Keys
Table 2.2 lists the front panel keys and their functions:
| Symbol | Key | Function |
|---|---|---|
| [Page Icon] | PAGE | Press to enter / exit Set-up mode. |
| [Down Arrow Icon] | DOWN | Press to decrease the parameter value. Holding the key pressed speeds up the change. |
| [Up Arrow Icon] | UP | Press to increase the parameter value. Holding the key pressed speeds up the change. |
| [Enter Icon] | ENTER | Press to store the set parameter value and scroll to the next parameter. |
Power Up
Upon power-on, displays and indicators are lit for approximately 3 seconds, followed by the model name on the Lower Readout and "PPI" on the Upper Readout.
Main Display Mode
The controller enters MAIN Display Mode after power-up. The Upper Readout shows the measured Temperature, and the Lower Readout shows the SP (Control Setpoint). In PID Control Mode, the Lower Readout can toggle between SP and % Output Power using the ENTER key.
Adjusting SP
To adjust the SP value in MAIN Display Mode:
- Press and release UP/DOWN key once; the Lower Readout starts flashing.
- Use UP/DOWN keys to adjust the SP value.
- Press and release ENTER key; the Lower Readout stops flashing, and the value is stored.
Timer (Soak) Mode Indication
If the soak timer is enabled, the Start command can be issued by setting the "Start" parameter to 'Yes' or by pressing the ENTER key for approximately 3 seconds in Main Mode. The Lower Readout then shows the Balance Soak Time, which can be toggled to show Setpoint or % output power.
Temperature Error Indication
If the temperature falls below the Minimum Range or rises above the Maximum Range, or if the input sensor is open/broken, the Upper Readout flashes error messages. Figure 2.3 illustrates an open sensor condition, displaying "OPEN".
Table 2.3 lists PV Error Types:
| Message | PV Error Type |
|---|---|
| Or | Over-range (Temperature above Max. Range) |
| Ur | Under-range (Temperature below Min. Range) |
| OPEN | Open (Sensor open / broken) |
Tune Indication
(Applicable for PID Control Only) When 'Self Tune Command' is issued, the controller tunes itself. The Lower Readout flashes "Tune" (Figure 2.4). Users should not disturb the process or parameters during tuning. The message disappears upon completion.
Section 3: SET-UP MODE : ACCESS AND OPERATION
The controller requires user settings called Parameters, grouped into Pages for ease of operation. Each Page has a unique PAGE NUMBER.
Parameter Prompts
Each parameter has an identifying tag (Parameter Prompt) displayed on the Lower Readout, with its current value on the Upper Readout.
Accessing a Page
Pages are accessible only from the MAIN Display Mode. Figure 3.1 illustrates accessing a desired PAGE:
- From MAIN Display Mode, press PAGE key to enter Set-up mode.
- Use UP/DOWN keys to set the desired Page Number.
- Press ENTER key to open the selected Page.
Adjusting Parameter Values
To adjust a parameter:
- Open the PAGE containing the parameter.
- Keep pressing ENTER key to select the desired parameter.
- Use UP/DOWN keys to set the value (e.g., changing 'Reverse' to 'Direct' for Control Logic).
- Press ENTER key to store the value and move to the next parameter.
- Press PAGE key to revert to MAIN Mode.
Parameter Locking
To protect parameters from unauthorized changes:
- In MAIN Display Mode, press PAGE key (Lower Readout shows PAGE, Upper shows 0).
- Use UP/DOWN keys to set the Page Number to 123 on the Upper Readout.
- Press ENTER key to enable Lock and return to MAIN Display Mode.
To Un-Lock, repeat the sequence twice.
Setting Default Values
To restore factory default values:
- In MAIN Display Mode, press PAGE key.
- Use UP/DOWN keys to set the Page Number to 99 (Default Code).
- Press ENTER key. The controller resets and restarts with default parameter values.
Section 4: INPUT / OUTPUT CONFIGURATION PARAMETERS : PAGE-12
Table 4.1 details input/output configuration parameters:
| Parameter Description | Settings (Default Value) |
|---|---|
| INPUT TYPE Select Input type (Thermocouple or RTD) for temperature measurement. | Refer Table 4.2 for available 'Input Types', Ranges, and Resolutions. (Default: Type K) |
| CONTROL LOGIC Reverse: Heating Control (Output Power decreases with increase in Temperature). Direct: Cooling Control (Output Power increases with increase in Temperature). | Reverse / Direct (Default: Reverse) |
| SETPOINT LOW Sets minimum permissible control setpoint value. | Min. Range to Setpoint High for the selected Input type (Default: Min. Range for the Selected Input Type) |
| SETPOINT HIGH Sets maximum permissible control setpoint value. | Setpoint Low to Max. Range for the selected input type (Default : Max. Range for the Selected Input Type) |
| OFFSET FOR MEASURED TEMPERATURE Algebraically added to the measured Temperature for display and comparison. Final Temperature = Measured Temperature + Offset. | -1999 to 9999 or -199.9 to 999.9 (Default: 0) |
| DIGITAL FILTER Determines averaging rate of measured temperature to reduce fast changes. Higher value means better averaging but slower response. | 0.5 to 25.0 Seconds (in steps of 0.5 Seconds) (Default: 1.0) |
| OUTPUT-2 FUNCTION SELECTION Configures Output (OP2): None (Off), Alarm, Control, Blower, Soak Time Output. | None / Alarm / Control / Blower / Soak Time Output (Default: None) |
Table 4.2 lists Input Type options:
| Option | What it means | Range (Min to Max) | Resolution |
|---|---|---|---|
| t_c_J | Type J Thermocouple | 0 to +960°C | 1°C |
| t_c_K | Type K Thermocouple | -200 to +1375°C | 1°C |
| rtd_i | 3-wire, RTD Pt100 | -199 to +600°C | 1°C |
| rtd_i | 3-wire, RTD Pt100 | -199.9 to +600.0°C | 0.1°C |
Section 5: OUTPUT-2 FUNCTION PARAMETERS : PAGE-11
Table 5.1 details OP2 Function: Alarm parameters:
| Parameter Description | Settings (Default value) |
|---|---|
| ALARM TYPE Sets the Alarm type: Process Low, Process High, Deviation Band, Window Band, End Of Soak. | Process Low / Process High / Deviation Band / Window Band / End of Soak (Default: Process Low) |
| ALARM INHIBIT No: Alarm not suppressed for start-up. Yes: Alarm inhibited until temperature is within limits after switch-on. | Yes / No (Default: Yes) |
| ALARM LOGIC Normal: Alarm output ON under alarm condition. Reverse: Alarm output OFF under alarm condition. | Normal / Reverse (Default: Normal) |
| ALARM TIMER Sets time duration in seconds for End of Soak Alarm. | 5 to 250 (Default: 10) |
Section 6: CONTROL PARAMETERS : PAGE-10
Table 5.1 (continued) details OP2 Function: Control and Blower parameters:
| Parameter Description | Settings (Default value) |
|---|---|
| HYSTERESIS (OP2 Control) Sets differential (dead) band between ON/OFF control states. | 1 to 999 or 0.1 to 99.9 (Default: 2 or 0.2) |
| CONTROL LOGIC (OP2 Control) Normal: Output ON for Temperature below Setpoint. Reverse: Output ON for Temperature above Setpoint. | Normal / Reverse (Default: Normal) |
| BLOWER / COMPRESSOR HYSTERESIS Sets differential (dead) band for blower ON/OFF states. | 1 to 250 or 0.1 to 25.0 (Default: 2 or 0.2) |
| BLOWER / COMPRESSOR TIME DELAY Sets time delay before compressor switches ON again after being switched OFF. | 0 to 600 Sec. (in steps of 0.5 Sec.) (Default: 0) |
Table 6.1 details Control Parameters:
| Parameter Description | Settings (Default Value) |
|---|---|
| CONTROL MODE Select Control Algorithm: On-Off or PID. | On-Off / PID (Default: PID) |
| HYSTERESIS (For On-Off Control only) Sets differential (dead) band between On-Off switching of control output. | 1 to 999 or 0.1 to 99.9 (Default: 2 or 0.2) |
| COMPRESSOR TIME DELAY (For On-Off Control only) Time delay for compressor switching. | 0 to 600 Sec. (in steps of 0.5 Sec.) (Default: 0) |
| CYCLE TIME (For PID Control only) For time-proportionating PID control, implements output power via ON:OFF time ratio. | 0.5 to 120.0 Seconds (in steps of 0.5 Seconds) (Default: 20.0 Sec) |
| PROPORTIONAL BAND (For PID Control only) Defines process value deviation from setpoint. Varies output power from 100% to 0%. | 0.1 to 999.9 (Default: 10.0) |
| INTEGRAL TIME (For PID Control only) Incorporated for automatic removal of offset error. Setting value 0 cuts-off Integral action. | 0 to 1000 Seconds (Default: 100 Sec) |
| DERIVATIVE TIME (For PID Control only) Determines how strong output power changes in response to rate of change of measured PV. Setting value 0 cuts-off Derivative action. | 0 to 250 Seconds (Default: 25 Sec) |
Section 7: SUPERVISORY PARAMETERS : PAGE-13
Table 7.1 details Supervisory Parameters:
| Parameter Description | Settings (Default Value) |
|---|---|
| SELF-TUNE COMMAND Set to YES to activate 'Tuning' operation. Select NO to abort tuning. | No / Yes (Default: No) |
| OVERSHOOT INHIBIT ENABLE / DISABLE Enable if process exhibits unacceptable overshoot. Controller monitors temperature change rate to minimize overshoot. | Disable / Enable (Default: Disable) |
| OVERSHOOT INHIBIT FACTOR Adjust to improve effectiveness of Overshoot Inhibit. Increase if overshoot is curbed but takes too long to reach SP; decrease if overshoot persists. | 1.0 to 2.0 (Default: 1.2) |
| OP2 SETPOINT EDITING PERMISSION ON OPERATOR PAGE Locks OP2 Setpoint adjustment on operator page (PAGE 0). | Disable / Enable (Default: Enable) |
| SOAK ABORT COMMAND ON OPERATOR PAGE Allows or restricts the 'Abort' command from operator page to stop the running Soak Timer. | Disable / Enable (Default: Enable) |
| SOAK TIME ADJUSTMENT ON OPERATOR PAGE Allows or restricts the adjustment of 'Soak Time Duration' on operator Page. | Disable / Enable (Default: Enable) |
Section 8: OPERATOR PARAMETER : PAGE-0
Table 8.1 details Operator Parameters:
| Parameter Description | Settings (Default value) |
|---|---|
| SOAK START COMMAND (Available only if Soak Timer is enabled) Set to 'Yes' to start soak timer. | No / Yes (Default: No) |
| SOAK ABORT COMMAND (Available only if Soak Timer is enabled) Set to 'Yes' to abort a running timer. | No / Yes (Default: No) |
| SOAK TIME (Available only if Soak Timer is enabled) Preset time value for the soak timer in selected units. | 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) |
| ALARM SETPOINT (Available if OP-2 function is Alarm) Sets Upper (Process High) or Lower (Process Low) Alarm Limit. | Minimum to Maximum Range specified for the selected Input Type (Default: 0) |
| ALARM DEVIATION (Available if OP-2 function is Alarm) Sets Negative (-) or Positive (+) deviation to define Alarm Limit. | -1999 to 9999 or -199.9 to 999.9 (Default: 3 or 0.3) |
| ALARM BAND (Available if OP-2 function is Alarm) Defines Process Low and Process High Alarm Limits relative to Control Setpoint (SP). | 3 to 999 or 0.3 to 99.9 (Default: 3 or 0.3) |
| AUXILIARY CONTROL SETPOINT (Available if OP-2 function is Control) Sets an offset to the Control Setpoint (SP) to define an Auxiliary setpoint. | (Min. Range - SP) to (Max. Range - SP) (Default: 0) |
| BLOWER CONTROL SETPOINT (Available if OP-2 function is Blower) Sets a positive (+) offset to the SP to define the 'Blower / Compressor Setpoint'. | 0.0 to 25.0 (Default: 0) |
| SETPOINT LOCKING Allows locking the adjustment of the SP on Lower Readout. Set to 'Yes' to protect SP from unauthorized changes. | Yes / No (Default: No) |
Section 9: SOAK TIMER PARAMETERS : PAGE-15
Table 9.1 details Soak Timer Parameters:
| Parameter Description | Settings Default Value |
|---|---|
| TIMER ENABLE Soak Timer function enabled or disabled. | No / Yes (Default: No) |
| TIME UNITS Select time units for Soak Time Duration. | Min:Sec / Hours:Min / Hours (Default: Min: Sec) |
| TIME DURATION Preset time value for the Soak Timer. | 00.05 to 60:00 Min:Sec or 00.05 to 99:55 Hrs:Min or 1 to 999 Hours (Default: 00.10 Min:Sec) |
| TIMER-START BAND Timer starts counting down once Temperature enters the band around SP. | 0 to 9999 or 0.0 to 999.9 (Default: 5 or 0.5) |
| HOLDBACK STRATEGY None: No temperature-based timer pause. Up: Timer paused if Temperature is outside holdband above SP. Down: Timer paused if Temperature is outside holdband below SP. Both: Timer paused if Temperature is outside holdband either above or below SP. | None / Up / Down / Both (Default: None) |
| HOLD BAND Sets temperature limits with respect to SP for timer pause. Timer stops counting down when Temperature is outside this band. | 1 to 9999 or 0.1 to 999.9 (Default: 5 or 0.5) |
| CONTROL OUTPUT OFF AT TIMER END Yes: Control output (OP1) is forced off upon timer completion. No: Control output state is not forced. | No / Yes (Default: No) |
| POWER-FAIL RECOVERY METHOD Continue: Resumes operation for balance time. Start: Re-runs the complete soak time. Abort: Suspends operation until a new start command is issued. | Continue / Start / Abort (Default: Continue) |
Soak Timer Operation
Figure 9.1 illustrates Soak Timer Operation. The graph shows Process Value (PV), Setpoint (SP), Start Band, and Time. The timer starts counting down when the PV enters the Start Band.
Basic Operation
The Soak Timer is a preset timer configurable as:
- Free Running Timer: Starts counting down immediately upon Start Command if 'Start Band' is set to 0.
- Setpoint Dependent Timer: Starts counting down only after the PV reaches within the 'Start Band' around the SP. For example, a 2°C start band around 100°C means countdown begins when PV is between 98°C and 102°C. Once the PV enters the 'Start Band', the timer continues regardless of whether the PV stays within the band.
Hold Band Operation
The 'Hold Band' ensures the timer counts down only when the PV is within the band. The timer pauses when the PV is outside the 'Hold Band'. The 'Hold Band' is set relative to the SP and can be above, below, or both above and below the SP.
Power-fail Recovery Modes
The timer supports three modes: Continue (resumes balance time), Re-start (reruns complete time), and Abort (suspends until new command).
End-of-Soak Events
Output Relay/SSR modules (OP2/OP3) can be configured as End-of-Soak Alarm with a settable duration. The controller also offers an 'Output-Off' strategy to force control output OP1 off upon End-of-Soak.
