Mitsubishi Electric Freqrol-A100 Instruction Manual page 43

Setting of minimum fre-
quency
Pr. 2 "minimum frequency"
Use this parameter to specify the lower limit of the output fre-
quency. When the minimum frequency has been set, merely
turning on the start signal starts the motor running at the set
frequency (if the frequency setting is OHz, no rotation will hap-
pen).
Factory setting: OHz
Setting of electronic overcur-
rent protector
Pr.
9
"electronic overcur-
rent protector"
The factory setting is the rated current value of the inverter.
When changing the set value, set the 50Hz current value given
on the motor rating plate.
Note: The operation characteristics, which are based on the
Mitsubishi standard squirrel-cage motor, do not apply to
a special motor. For a special motor, provide a thermal
relay on the outside to protect the motor. (A constant-
I
torque motor can be selected by the setting of Pr. 71 .)
selection of applied loady
Pr. 14 "applied load selec-
tion"
Allows the optimum output characteristic (VIF characteristic) to
be selected for application and load characteristic.
I
Application
For
c o n s t a n t - t o r q u e
loads
( e . g . c o n v e y o r ,
carrier)
Selection of external thermal
relay input
Pr. 17 "external thermal
relay input"
0
(factory
s e t t i n g )
F o r v a r i a b l e - t o r q u e
loads (e.g. fan, pump)
When a thermal relay is installed outside the inverter or the motor
contains a temperature sensor, this parameter switches the func-
tion of the JOGIOH input terminal to OH (external thermal relay
input).
Set
Value
1
Remarks
Note: When terminal RT is ON, the second control functions
(second accelerationldeceleration time, second torque
boost and second base frequency) are selected.
0
(factory
setting)
0
-
0
-
Pr. 17 Set
Value
When any of 4 to 7 is set in Pr. 17 "external thermal relay input"
and 9 is set in Pr. 40 "output terminal assignment", the open
motor circuit detection signal is output as an open collector
signal to the terminals selected in Pr. 40.
4
JOGlOH Termlnal Functlon
Jog Mode
0
Output
Termlnal Slgn;
Set lo " 9 "
In Pr. 40
OH (external
thermal relay
Input)
MRS Terminal Functlon
NIO Input
-
Open motor
circuit
5
NIC Input
0
-
-
0
0
-