Why can't I access programming on my Red Lion Controller?
If you cannot access programming on your Red Lion Controller, it could be because an active User Input is programmed for PLOC; deactivate the User Input. Alternatively, you may have entered an incorrect access code. Enter the proper access code at the CodE 0 prompt (111 or -111 is the universal access code).
Why is there no display on my Red Lion Controller?
If there is no display on your Red Lion Controller, it could be due to several reasons. First, check if the power is off. Second, a brown-out condition might be present, so verify the power reading. Third, there might be a loose connection or improper wiring, so check all connections. Lastly, ensure the controller is fully seated into the case by checking the installation.
What to do if red lion PXU11A20 Controller shows '????' in the top display?
If your Red Lion Controller displays '????' in the top display, it could be due to several reasons. It may be that the input exceeds the range of the controller, so check the input parameters. Alternatively, the temperature might exceed the range of the input probe, so change to an input sensor with a higher temperature range. Also, the transmitter or probe could be defective or incorrect, so replace them. Finally, the temperature may be too high for the probe, so reduce the temperature.
What to do if red lion PXU11A20 shows ' . . . ?. . .' or 'IN' in display?
If your Red Lion Controller displays ' . . . ?. . .' or 'IN', it might be because the display value exceeds the 4-digit display range, so check the input parameters. Another reason could be a defective or miscalibrated cold junction circuit, so change the display resolution or scaling.
Why is my red lion PXU11A20 Controller sluggish or not stable?
If your Red Lion Controller is sluggish or not stable, it could be due to incorrect PID values. Also, the probe location could be incorrect; evaluate its placement.
What to do if red lion PXU11A20 shows '????' in display?
If your Red Lion Controller displays '????' in the display, it could be due to a disconnected probe, so check the probe wire or change the probe. Another reason might be a broken or burned-out probe, so check the sensor input type selection.
What to do if Red Lion Controller shows '????' in top display?
If your Red Lion Controller displays '????' in the top display, it could be because the input is below the range of the controller, so check the input parameters. It may also be that the temperature is below the range of the input probe, so change to an input sensor with a lower temperature range. Also, the transmitter or probe could be defective or incorrect, so replace the transmitter or probe. Finally, the temperature may be excessively low for the probe, so raise the temperature.
General| Model | PXU11A20 |
|---|---|
| Category | Controller |
| Operating Temperature | 0 to 50 °C |
| Certifications | CE, UL |
| Output 1 | Digital |
| Output 2 | Analog |
| Supply Voltage | 24V DC |
| Display | LCD |
| Communication Protocol | Modbus |
| Power Consumption | 5 W |
| Storage Temperature | -20 to 75 °C |
| Humidity | 5% to 95% non-condensing |
| Enclosure Rating | IP20 |
Explains how to make wiring connections to the rear screw terminals safely.
Describes the function of front panel keys and the top/bottom displays.
Explains how to navigate and view parameters in the Display Loop.
Details how to access and change parameters in the Parameter Loop.
Explains selecting PID groups for different setpoint configurations.
Describes how to view and change the active setpoint value.
Details indicators for profile run status like Run, Stop, Pause, and Delay.
Explains the four-digit display indicating profile run status and segment details.
Selects the appropriate input type (TC, RTD, VDC, mA) for the connected sensor.
Restricts the setpoint value from going below a safe operating area.
Restricts the setpoint value from going above a safe operating area.
Selects the input type for the remote setpoint signal.
Determines the action (Reverse or Direct) for each output.
Selects the control mode for the output, such as PID or On/Off.
Selects how the controller uses setpoints: fixed, profile, or remote.
Sets access levels for various parameters to control user visibility and editability.
Sets alarm actions, annunciators, reset modes, and standby options.
Lists various alarm actions like Absolute High/Low, Deviation, Band Acting.
Configures action, annunciator, reset mode, standby, value for Alarm 1.
Configures action, annunciator, reset mode, standby, value for Alarm 2.
Configures action, annunciator, reset mode, standby, value for Alarm 3.
Selects and edits PID parameter groups for specific setpoints.
Associates setpoint values with PID groups for automatic selection.
Configures communication type (RTU/ASCII), baud rate, data bits, parity, and unit address.
Guides on using Crimson software for PXU configuration and data transfer.
Lists frequently used Modbus registers for PXU data access and control.
Describes how the process oscillates around the setpoint with ON/OFF control.
Explains PID control using Proportional, Integral, and Derivative parameters.
Details the user-initiated function to automatically determine PID parameters.
Provides an alternative method for tuning PID parameters when Auto-Tune is insufficient.
Describes the PXU's capability for ramp/soak profile operation with segments and timing.
Details how to set up profiles, including SEPE parameter and Line 2 display parameters.
Explains modes like Run, End/Stop, Pause, and Delay for profile execution.
Covers profile start, end/stop, and advance operations via various methods.
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