Mitsubishi Electric 700 Series, Instruction Manual

Page: 192 / 416

181
Frequency setting by analog input (terminal 1, 2, 4)
4
P
ARA
MET
E
RS
(c) Method to adjust only the frequency without adjustment of a gain voltage (current).
(When changing the gain frequency from 60Hz to 50Hz)
REMARKS
⋅
Changing C4 (Pr. 903) or C7 (Pr. 905) (gain adjustment) value will not change the Pr. 20 value. The input of terminal 1 (frequency
setting auxiliary input) is added to the speed setting signal.
⋅
For the operating procedure using the parameter unit (FR-PU04/FR-PU07), refer to the FR-PU04/FR-PU07 instruction manual.
⋅
When setting the value to 120Hz or more, it is necessary to set Pr. 18 High speed maximum frequency to 120Hz or more. (Refer to
page 87)
⋅
Make the bias frequency setting using calibration parameter C2 (Pr. 902) or C5 (Pr. 904). (Refer to page 178)
CAUTION
Be cautious when setting any value other than "0" as the bias frequency at 0V (0mA). Even if a speed command
is not given, merely turning ON the start signal will start the motor at the preset frequency.
♦
Parameters referred to
♦
Pr. 20 Acceleration/deceleration reference frequency Refer to page 101
Pr. 73 Analog input selection, Pr. 267 Terminal 4 input selection Refer to page 171
Pr. 79 Operation mode selection Refer to page 195
Display Operation
Flicker...Parameter setting complete!!
1.
Pr. 125
) or
(
Pr. 126
) appears.
4.
Press to set.
5.
Mode/monitor check
Press twice to choose the
monitor/frequency monitor.
or
Terminal 2 input Terminal 4 input
Terminal 2 input Terminal 4 input
3.
Turn to change the set value to
" ". (50.00Hz)
2.
Press to show the present set value.
(Rated motor frequency (initial value))
6.
Apply a voltage across the drive unit
terminals 2 and 5 (across 4 and 5) and
turn ON the start command (STF, STR).
Operation starts at 50Hz.