Omron RX User Manual page 178

4-2 Function Mode
External Thermistor (TH)
•This function enables thermal protection of the external equipment (e.g. motor) if its internal
thermistor is connected to the Inverter.
Parameter No.
b098
4
b099
C085
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.)
4-73
Function name
00: Disabled
01: Enabled, Positive temperature
Thermistor selection coefficient resistance element (PTC)
02: Enabled, Negative temperature
coefficient resistance element (NTC)
0 to 9999.:
Set a temperature resistance value to trip
Thermistor error level
the Inverter, according to the
specifications of your thermistor.
0.0 to 1000.:
Thermistor adjustment
Used for gain adjustment.
Data Default setting
Factory default
Unit
⎯
00
Ω
3000.
⎯