Initial Setting; Setting The Electronic Gear (Pr. 420, Pr. 421, Pr. 424) - Mitsubishi Electric FR-A7AL Instruction Manual

POSITION CONTROL FUNCTION
6.4.2

Initial setting

(1) Shorting the terminal LX-SD (servo on) switches the servo on and cancels the base circuit shut-off,
resulting in a servo lock status.
(2) Opening terminal LX-SD shutting the base circuit.
(3) Short the terminal STF (forward rotation stroke end) or terminal STR (reverse rotation stroke end) and
the SD terminal.
(4) When command pulse is input, the motor rotates in response to the pulse command.
6.4.3

Setting the electronic gear (Pr. 420, Pr. 421, Pr. 424)

Set the ratio of the machine side gear and the motor side gear.
Parameter
Name
Number
Command pulse scaling
420
factor numerator
Command pulse scaling
421
factor denominator
Position command
acceleration/
424
deceleration time
constant
The above parameters can be set when the FR-A7AL (option) is mounted.
* When the operation panel (FR-DU07) is used, the maximum setting is 9999. When a parameter unit is used, up to the maximum value
within the setting range can be set.
54
Initial Setting
Value Range
1 0 to 32767 *
Set the electronic gear.
Pr. 420 is a numerator and Pr. 421 is a denominator.
1 0 to 32767 *
Use this parameter when rotation has become
0s 0 to 50s unsmooth at a large electronic gear ratio (about 10
times or more) and low speed.
Description