Lenze i700 - Manual (Page 252)

8 Monitoring functions
8.5 Motor temperature monitoring
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Lenze · i700 servo inverter · Reference manual · DMS 1.5 EN · 03/2014 · TD05
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8.5.1 Spec. charact. curve for motor temperature sensor
This function extension is available from version 01.03!
If required, you can define and activate a special characteristic for the motor temperature sensor.
• The special characteristic is activated by setting 0x2D49:1 = "3" (or 0x3549:1 = "3" for axis B).
• The special characteristic is defined based on two parameterisable sampling points. The two
sampling points define a line which is extrapolated to the right and to the left. In the Lenze
setting, the special characteristic is defined as follows:

Stop!
The implemented solution is not suitable as a replacement for a tripping unit for the
thermal protection of rotating electrical machines (EN 60947-8:2003)!
Lenze setting of the special characteristic
Axis A Axis B Description Lenze setting
0x2D49:6 0x3549:6 Sampling point  - Temperature 25.0 °C
0x2D49:8 0x3549:8 Sampling point  - resistance 1000 Ohm
0x2D49:7 0x3549:7 Sampling point  - Temperature 150.0 °C
0x2D49:9 0x3549:9 Sampling point  - resistance 2225 Ohms

Note!
• Selecting a motor from the motor catalogue causes the parameters of the special
characteristic to be overwritten!
• If the inverter measures a resistance of below 122 Ω, this is assessed as a sensor error
and a temperature of -666 °C is output.
• In individual cases, a short circuit is a wanted status (e.g. temperature contact, closed
below 140 °C). For this purpose, the sampling point 1 ( 0x2D49:8 or 0x3549:8 for axis
B) must be below 122 Ω to not trigger a sensor error anymore. The temperature is
continued to be calculated.
0
1000
2225
0 150
W
°C 25
Œ
