5-120
5-9 Functions Relating to Protections, Warnings and Various Output Signals
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
5
Functions
External Trip (EXT)
Use this function to trip the Inverter via an error signal generated from a peripheral system. In
this case, allocate "12: EXT" to any Multi-function Input Selections (C001 to C007).
When the EXT terminal is turned ON, E12 is displayed and the Inverter trips to shut off the
output.
When the Inverter has tripped, indicating E12, the trip will not be reset even if the error signal
from external equipment is reset (EXT terminal is turned OFF).
To reset the trip, perform the reset operation or turn the power off and on again.
 Do not turn on the EXT terminal after shutting off the power. The fault monitor data may not be
stored correctly.
Thermistor Trip Function
This function enables thermal protection of the external equipment (e.g. motor) if its internal
thermistor is connected to the Inverter.
Wire the external thermistor between control terminals S5/TH and SC and allocate TH to Multi-
function Input Terminal S5 (C005 = 19: TH).
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, consider separating the wires, etc. to
prevent noise due to motor current.
Note: If "Thermistor" is allocated to C005 but no thermistor is connected, a trip occurs.
Parameter
No.
Function name Data
Default
setting
Unit
C001 to C007
Multi-function
Input Selection
12: EXT (External trip)
−−
RUN command FW, RV
EXT terminal input
Motor rotation speed
RS (reset) input
AL output
(alarm signal)
Free run
Parameter
No.
Function name Data
Default
setting
Unit
C085
Thermistor
Adjustment
0.0 to 200.0.
The gain of input voltage is fine-tuned.
100.0 %
C005
Multi-function
Input Selection
19: TH (PTC thermistor thermal
protection)
02(CF1) −
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