Orientation Command (X22 Signal): Pr. 180 To Pr. 183, Pr. 187 Setting "22; Pre-Excitation/Servo On (Lx Signal): Pr. 180 To Pr. 183, Pr. 187 Setting "23; Output Stop (Mrs Signal): Pr. 180 To Pr. 183, Pr. 187 Setting "24; Start Self-Holding Selection (Stop Signal): Pr. 180 To Pr. 183, Pr. 187 Setting "25 - Mitsubishi Electric FR-V500 Instruction Manual

How to use the input signals
(assigned terminals DI1 to DI4, STR)
1.8.11 Orientation command (X22 signal):
With the position detector (encoder) fitted to the motor end, you can perform position stop (orientation) control of the
rotation shaft. Refer to page 159 for details.
Related parameters
Pr. 350 "stop position command selection", Pr. 351 "orientation switchover speed", Pr. 356 "internal stop position command", Pr. 357
"orientation in-position zone", Pr. 360 "external position command selection", Pr. 361 "position shift", Pr. 362 "orientation position loop
gain", Pr. 393 "orientation selection", Pr. 396 "orientation speed gain (P term)", Pr. 397 "orientation speed integral time", Pr. 398
"orientation speed gain (D term)", Pr. 399 "orientation deceleration ratio" (Refer to page 159.)
1.8.12 Pre-excitation/servo on (LX signal):
Pre-excitation
When the start signal (STF, STR) is not input to the inverter (during a stop), turning on the pre-excitation terminal LX
enables 0 speed control or servo lock. (Refer to page 82 for details.)
Servo on
Use the LX signal to exercise position control.
Turning on the LX signal switches the servo on and cancels the base circuit shut-off, resulting in a servo lock status.
(Refer to page 55 for details.)
Related parameters
Pre-excitation ⇒ Pr. 802 "pre-excitation selection" (Refer to page 82.)
Servo-on ⇒ Pr. 419 "position command source selection", Pr. 420 "command pulse scaling factor numerator", Pr. 421 "command
pulse scaling factor denominator", Pr. 422 "position loop gain", Pr. 423 "position feed forward gain", Pr. 424 "position
command acceleration/deceleration time constant", Pr. 425 "position feed forward command filter", Pr. 426 "in-position
width", Pr. 427 "excessive level error", Pr. 430 "pulse monitor selection", Pr. 464 "digital position control sudden stop
deceleration time", Pr. 465 to Pr. 494 (position feed amount) (Refer to page 55.)
1.8.13 Output stop (MRS signal):
Short the output stop terminals MRS-SD during inverter output to cause
the inverter to stop the output immediately.
This function is valid in any mode independently of the control mode.
Open terminals MRS-SD to resume operation in about 20ms.
Terminal MRS may be used as described below.
(1) To stop the motor by mechanical brake (e.g. electromagnetic brake)
Terminals MRS-SD must be shorted when the mechanical brake is
operated and be opened before the motor that has stopped restarts.
(2) To provide interlock to disable operation by the inverter
After terminals MRS-SD have been shorted, the inverter cannot be
operated if the start signal is given to the inverter.
(3) To coast the motor to stop
The motor is decelerated according to the preset deceleration time
and is stopped by operating the DC injection brake at the DC
injection brake operation speed or less. Using terminal MRS, the
motor is coasted to a stop.
1.8.14 Start self-holding selection (STOP signal):
The connection example given here is used to self-hold
the start signal (forward rotation, reverse rotation).
* Connected to the STOP signal to disable forward or
reverse rotation if forward or reverse rotation and stop
are turned on at the same time.
Pr. 180 to Pr. 183, Pr. 187 setting
Pr. 180 to Pr. 183, Pr. 187 setting
Pr. 180 to Pr. 183, Pr. 187 setting
Pr. 180 to Pr. 183, Pr. 187 setting
Forward
rotation
Reverse
rotation
(Wiring example for sink logic)
32
"22"
"23"
"24"
Motor coasts
to stop
ON
Across MRS-SD
ON
Across STF
(STR)-SD
"25"
*
STOP
Stop
SD
STF
STR
0.5r/min
Approx.
20ms