The Condition Monitoring Unit (CMU) is the measurement and analysis hardware for condition monitoring applications based on vibration measurement. Several modules can be connected to a CMU. These include modules for reading digital signals, analog signals, and vibration sensors. The TCP/IP communication protocol is used to exchange process data (e.g. shaft speed, weight, torque, etc.) with the automation environment (e.g.PLC).

Based on the sensor and process data, characteristic value calculations are performed (RMS, ISO, frequency band characteristic value, etc.). These characteristic values can be transmitted to the automation environment using TCP/IP telegrams, analog outputs, or digital outputs.

Different CMU types are supported:

• ibaCMU-S

• ibaDAQ.

• ibaM-DAQ

In contrast to ibaCMU-S the CMU ibaDAQ and ibaM-DAQ are based on the standard software ibaPDA. As a device ibaDAQ belongs to the iba Modular System and sits on the first slot (left) of the backplane. Beside the ibaCMC-specific data processing in terms of vibration analysis, the different software architecture of ibaDAQ provides for the use of more features, which are part of ibaPDA. Such features may be for example additional calculations with the integrated expression builder and generation of virtual signals, comprehensive diagnostics, visualization of actual data, creation of additional data stores and many more.

The CMU ibaM-DAQ is part of the ibaMAQ System and provides the same advantages like ibaDAQ with regard to ibaPDA features. This system too can be extended by input modules for IEPE sensors and other analog and digital signals.

The basic principle of data exchange and configuration applies to all CMU types, i.e. ibaDAQ as well as ibaM-DAQ is to be configured by ibaCMC and sends computed values and snapshot files with raw data back to ibaCMC.

Status information

At the top right of the plant configuration detail panel, various status information relating to the CMU is displayed. Chapter Icon legend describes the icons used here.

Name	ibaCMU-S	ibaDAQibaM-DAQ	Description
Connection status	X	X	Green: CMU is accessible Gray: CMU is not accessible
Configuration status	X	X	Green: The configuration on the CMU and the configuration in the ibaCMC match and there are no errors. Yellow: The configuration on the CMU is not up to date and needs to be updated, the CMU configuration is being created and uploaded, or no CMU configuration has been created yet. Red: The CMU is reporting an error in the configuration. Gray: The CMU is inactive.
iba website	X	--	Link to configuration website. Only works if the CMU can be accessed from the browser and there is a network connection.