To Next PageTo Next PageHow to troubleshoot no display on red lion PXU?
If the Red Lion Controller displays nothing, the issue might stem from several causes. First, ensure the controller is receiving power by checking the power supply and verifying the power reading. A loose or improperly wired connection could also be the culprit, so inspect all connections. Lastly, confirm that the controller is fully seated in its case, checking the installation.
What to do if red lion PXU displays '????'?
If your Red Lion Controller displays '????', it could indicate a probe issue. First, check the probe wire and consider changing the probe. It might also be due to a broken or burned-out probe, so check the sensor input type selection. Additionally, inspect for corroded or broken terminations. Note that excessive process temperature may also be the cause.
What to do if Red Lion Controller shows '????' in top display?
If the top display of your Red Lion Controller shows '????', it could be due to several reasons: 1. The input may exceed the controller's range, so check the input parameters. 2. The temperature might exceed the input probe's range, so consider changing to an input sensor with a higher temperature range. 3. The transmitter or probe might be defective or incorrect, so replace them. 4. The probe might be experiencing excessively high temperatures, so reduce the temperature.
How to access programming on Red Lion Controller?
If you cannot access programming on your Red Lion Controller, it might be due to an active User Input programmed for PLOC. Deactivate the User Input. Alternatively, an incorrect access code may have been entered, so enter the proper access code at the CodE 0 prompt (111 or -111 = universal access code).
Why is my red lion PXU Controller not working?
If your Red Lion Controller is not working, it may be due to incorrect setup parameters, so you should check them. Alternatively, the controller may be in Stop Mode, in which case you should change it to Run mode.
What to do if red lion PXU Controller shows '????' in top display when measuring low temperatures?
If the top display of your Red Lion Controller shows '????', it could be due to several reasons: 1. The input is below the controller's range, so check the input parameters. 2. The temperature is below the input probe's range, so change to an input sensor with a lower temperature range. 3. The transmitter or probe is defective or incorrect, so replace the transmitter or probe. 4. The probe is experiencing excessively low temperatures, so raise the temperature.
Why does my red lion PXU Controller display '. . . ?. . .' or 'IN'?
If your Red Lion Controller displays '. . . ?. . .' or 'IN', it may be because the display value exceeds the 4-digit display range, in which case you should check the input parameters (Input Type). A defective or miscalibrated cold junction circuit could also be the cause, so change the display resolution/scaling. Also, loss of setup parameters may be the cause.
Why is my Red Lion Controller sluggish or not stable?
If the Red Lion Controller is sluggish or unstable, it may be due to incorrect PID values. See PID control. Another possible cause is an incorrect probe location, so evaluate the probe location.
General| Control Modes | PID, On/Off |
|---|---|
| Mounting | Panel Mount |
| Input Types | Thermocouple, RTD |
| Output Types | Relay, Analog |
| Power Supply | 100-240 VAC, 24 VAC/VDC |
| Communication | Modbus RTU |
Provides an overview of the PXU controller's capabilities and features.
Details the controller's main control modes, outputs, and tuning.
Explains the configuration options for alarm functions.
Describes the physical build and materials of the controller.
Details specifications for RTD sensor types.
Provides specifications for various process signals.
Details specifications for thermocouple sensor types.
Lists optional accessories available for the controller.
Procedure to configure the input jumper for current inputs.
Instructions for mounting the 1/16 DIN controller model.
Instructions for mounting the 1/8 DIN controller model.
Instructions for mounting the 1/4 DIN controller model.
Details on wiring the controller's power supply.
Wiring guidance for various sensor and process inputs.
Wiring for output control signals and alarm outputs.
Description of the functions of the front panel keys.
Describes the main display navigation and parameter viewing.
Explains navigation through configurable parameters.
Describes access to advanced and hidden parameters.
Details on managing access to programming features via an access code.
Description of the SPx parameter for active setpoint value.
Description of the OP0F parameter for output power offset.
Description of the Prop parameter for proportional band.
Selection of the input sensor type.
Setting the temperature scale to Fahrenheit or Celsius.
Configuration of the digital filter for noise reduction.
Scaling input signal to display units.
Defines the heating/cooling direction for outputs.
Selection of PID, On/Off, or Manual control modes.
Setting the timing for time proportional output 1.
Scaling analog output signals for output 1.
Configuration of setpoint parameter visibility.
Configuration of PID parameter visibility.
Configuration of alarm parameter visibility.
Setting the security code for parameter access.
Defining the action for Alarm 1.
Defining the action for Alarm 2.
Defining the action for Alarm 3.
Setting the hysteresis value for alarms.
Common Modbus register mappings for PXU controller.
Explanation of On/Off control logic and figures.
Explanation of PID control logic and response.
Procedure for automatic PID tuning.
Steps to initiate the auto-tune process.
Analyzing process response for PID tuning.
Procedure for manual PID tuning.
Using the controller as a digital potentiometer.
