49
2-8-8
Electronic Thermal Overload Function
Item name
Constant to be set
Factory preset
Motor type
No. 18
0000
Motor rated current
No. 19
1.9 A (for A2004)
Motor output current is monitored by the Inverter’s built-in elec-
tronic thermal overload function to prevent Inverter exclusive-use
motors or standard motors from overloading.
It is not necessary to mount an thermal overload relay externally.
However, to connect several motors to one Inverter, a thermal
overload relay must be inserted for each motor. It is necessary to
reduce carrier frequency according to the wiring distance between
the Inverter and motor when thermal overload relays are inserted.
For details, refer to the precautions on wiring described in
1-4 Wir-
ing.
No. 19 = Motor rated current value
Set the motor rated current value according to the
value on the motor nameplate.
2
nd
digit
0: Standard motor
1: Exclusive-use motor
No. 18 = xx00
1
st
digit
0: Electronic thermal overload function enabled
1: Electronic thermal overload function disabled
Electronic thermal protection can be disabled by setting “No. 18 =
xxx1.”
2-8-9
Multi-function Analog Output Monitor
Item name
Constant to be set
Factory preset
Output monitor selection
No. 21
0000
Output frequency or motor current can be monitored. (Standard
function)
No. 21 = xx0x
2
nd
digit
0: Output frequency is monitored.
1: Motor current is monitored.
Analog output monitor gain can be set to No. 45.
Description of Functions and Constants
Section 2-8
