How To Fix AH021 - From-measured pressure is zero

SAP Error Message - Details

• Message type: E = Error

• Message class: AH - IS-U billing (master data)

• Message number: 021

• Message text: From-measured pressure is zero

What causes this issue?

The zone start cannot be zero. Only the first zone can be set to 0.

System Response

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AH021 - From-measured pressure is zero ?

  The SAP error message "AH021 From-measured pressure is zero" typically relates to issues in the context of process control or measurement in SAP systems, particularly in modules dealing with process industries or manufacturing. This error indicates that the system is receiving a zero value for the measured pressure from a sensor or input device, which is unexpected and can lead to process disruptions.
  Causes:
  
  Sensor Malfunction: The pressure sensor may be faulty or damaged, leading to incorrect readings.
  Calibration Issues: The sensor may not be properly calibrated, resulting in inaccurate measurements.
  Connection Problems: There could be issues with the wiring or connections between the sensor and the SAP system, causing a failure to transmit the correct data.
  System Configuration: Incorrect configuration settings in the SAP system related to the measurement points or process parameters.
  Process Conditions: The actual process conditions may be such that the pressure is genuinely zero, which could indicate a problem in the process itself.
  
  Solutions:
  
  Check Sensor Functionality: Inspect the pressure sensor for any physical damage or malfunction. Replace it if necessary.
  Calibration: Ensure that the sensor is properly calibrated according to the manufacturer's specifications.
  Inspect Connections: Check all wiring and connections to ensure they are secure and functioning correctly.
  Review Configuration: Verify the configuration settings in the SAP system to ensure they are set up correctly for the measurement points.
  Process Review: Investigate the process conditions to determine if the zero pressure reading is valid. If the process is supposed to have pressure, further investigation into the process may be required.
  
  Related Information:
  
  Documentation: Refer to the SAP documentation for specific modules related to process control (like SAP PP, SAP PM, or SAP PI) for detailed troubleshooting steps.
  Support: If the issue persists, consider reaching out to SAP support or consulting with a technical expert who specializes in SAP process control systems.
  Monitoring Tools: Utilize monitoring tools within SAP to track sensor performance and historical data to identify patterns that may lead to the error.
  
  By addressing the potential causes and implementing the suggested solutions, you should be able to resolve the "AH021 From-measured pressure is zero" error in your SAP system.