4-73
4-2 Function Mode
4
Functions
External Thermistor (TH)
•This function enables thermal protection of the external equipment (e.g. motor) if its internal
thermistor is connected to the Inverter.
Note: If thermistor selection b098 is set to "01" without connecting an external thermistor, the Inverter trips.
•Connect an external thermistor between control terminals TH and PLC.
•Set the following functions according to the specifications of your thermistor.
•When this function is used, keep the cable length between the motor and Inverter within 20 m.
Since the current flowing through the thermistor is weak, you must take measures to prevent noise
due to motor current. (For example, place the thermistor cable away from the motor cable.)
Parameter No. Function name Data Default setting Unit
b098 Thermistor selection
00: Disabled
01: Enabled, Positive temperature
coefficient resistance element (PTC)
02: Enabled, Negative temperature
coefficient resistance element (NTC)
00
b099 Thermistor error level
0 to 9999.:
Set a temperature resistance value to trip
the Inverter, according to the
specifications of your thermistor.
3000.
C085 Thermistor adjustment
0.0 to 1000.:
Used for gain adjustment.
Factory default
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