EL32xx settings
The following chapters list the necessary and optional settings for taking temperature or resistance measurements with the EL32xx:
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Further settings |
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Mixed operation of low-impedance and high-impedance sensors within a terminal operating in multiplex mode must be avoided! Due to large differences in resistance between the sensor types, mixed operation of low-impedance sensors, e.g. Pt/Ni, and high-impedance sensors, e.g. NTC, within a terminal should be avoided if the terminal operates in multiplex mode, i.e. channels are read in successively by an ADC. In this case, larger measuring errors can occur for the low-resistance sensors. |
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![]() | RTD basics The RTD basics in chapter "Basics of RTD technology" of the IO Analog Manual and "RTD measurement in EL32xx" must be observed. |
Overarching orientation is provided by the data flow, the successive processing steps from the ADC converter to the process data output to EtherCAT:
Data flow

- The terminal permanently records measured values and puts the filtered raw values XADC of the A/D converter into the ADC raw value object 0x80nE:01.
- After each acquisition of the analog signal, the correction calculation is performed with the calibration values, measured value after calibration:
Ycalibrated = ((ADC raw data / 8) - Calibration offset) * Calibration gain * 2-18 - optional: Wire calibration
- optional: Transformation RTD element R [Ohm] -> T [°C]
- If user scaling is activated (0x80n0:01 = TRUE) the measured value is calculated including user scaling: Yscaled = (Ycalibrated * AW * 2-16) + BW
Otherwise Yscaled = Ycalibrated - Application "Presentation
- optional: limit evaluation
- Measured value output to EtherCAT
Changes of the slave parameters in the CoE directory
The CoE parameters may have to be changed in the "CoE online" tab of the EtherCAT slave during commissioning.

For detailed information on settings and operation modes, please read the following chapters on Basic settings and "Further settings (optional)".
![]() | Reset the terminal If an EL32xx which was already configured in use is to be put into operation, it is recommended that the settings in the CoE be reset to the factory settings if necessary (see chapter "Restoring the delivery state") |
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Changes in the CoE directory (CAN over EtherCAT directory), program access When using/manipulating the CoE parameters observe the general CoE notes in chapter "CoE interface" of the EtherCAT system documentation:
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