Mitsubishi FX-1PG - Two-Speed Positioning Operation and External Command Positioning Operation

6.36.3 Two-Speed Positioning Operation and
External Command Positioning Opera-
tion
■ Two-speed positioning operation
The motor performs the following operation by the
two-speed positioning operation command. Approach
at high speed as well as processing and moving forward
at low speed can be performed.
When the start command is received, the motor
performs positioning at the operating speed V(I) (BFMs
#20 and #19) until the set position P(I) (BFMs #18 and
#17), then at the operating speed V(II) (BFMs #24 and
#23) until the set position P(II) (BFMs #22 and #21)
(two-step speed).
■ External command positioning operation
Commands for determining the deceleration start point
and the stop point are given from the external limit
switches. The PGU does not control the pulse quantity,
and positioning is performed by the two-step speed
technique.
When the start command is received, the motor
performs positioning at the operating speed V(I) (BFMs
#20 and #19) until the deceleration command is
received. At that time, the motor decelerates to the
operating speed V(II) (BFMs #24 and #23). When the
stop command is received, pulse generation is stopped
immediately.
The rotation direction is determined by the sign (positive
or negative) of the operating speed V(I).
The deceleration command detects the change in the
input signal. (OFF→ON, ON→OFF)
The stop command reads the state of the input signal
level. (OFF or ON)
The sign of operating speed V(II) is disregarded.
Speed
Start
max
V
bia
V
V(II)
Travel P (I) Travel P (II)
V(I)
Speed
Start
max
V
bia
V
V(II)
V(I)
Deceleration command
(DOG input)
Stop command
(STOP input)
6
FX-1PG/FX 2N -1PG PULSE GENERATOR UNIT OUTLINE OF OPERATION MODES
6-7