Parameterization and programming
ELX3202 and ELX3204
40
Version: 1.4.0
5
Parameterization and programming
5.1
Settings and application notes
5.1.1
Default settings
The EL320x can be used for direct temperature or resistance measurements. The corresponding CoE
settings are shown in the following table.
The relationship between temperature and resistance of a Pt100/Pt1000 sensor is shown below:
Temperature
typical resistance, approx.
850°C
Pt1000: 3.9 kΩ
Pt100: 390 Ω
320°C
Pt1000: 2.2 kΩ
Pt100: 220 Ω
-200°C
Pt1000: 180 Ω
Pt100: 18 Ω
Characteristic sensor curves are available from the sensor manufacturers.
You can obtain further information in the chapters
Object description and parameterization [
Process data and operating modes.
ELX3202
ELX3204
Default/
factory setting
• 4-wire connection
• Pt100 (CoE 0x80n0:19)
• Presentation signed (CoE 0x80n0:02)
• Limits disabled
• All channels enabled
• 2-wire connection
• Pt100 (CoE 0x80n0:19)
• Presentation signed (CoE 0x80n0:02)
• Limits disabled
• All channels enabled
Notice regarding Resistance Measurement mode
In Resistance Measurement mode the measured value is always displayed unsigned, irrespective of the
Presentation setting (object
), as 0...xFFFF with the respective value.
1/16 Ω -> ~62 mΩ/Digit
1/64 Ω -> ~15 mΩ/Digit
5.1.2
Changing the slave parameters in the CoE directory
During commissioning it may be necessary to change the CoE parameters.
• If the terminal is accessed online, the CoE directory is read from the slave and can be changed, see
fig.
Accessing the CoE parameters in the TwinCAT System Manager
.
• If the terminal is accessed offline (the terminal is then not addressable) the data from the XML
description is used. The parameters cannot be changed.
The CoE parameters (CAN over EtherCAT) can be changed in the
CoE-Online
tab of the EtherCAT slave.
Содержание ELX3202
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