Mitsubishi FR-A800

Position control under vector control and PM sensorless vector control
PARAMETERS
245
5
Operation outline
• If the Pre-excitation/servo ON (LX) signal is turned ON, output shutoff is canceled and the Position control preparation
ready (RDY) signal is turned ON after 0.1 s. When STF (forward stroke end signal) or STR (reverse stroke end signal) is
turned ON, the motor rotates according to the command pulse. When the forward (reverse) stroke end signal is turned OFF,
the motor does not rotate in the corresponding direction.
Selecting the pulse train type (Pr.428 and NP signal)
•Set Pr.419 Position command source selection="2" (simple pulse train position command).
• Set "68" in any of Pr.178 to Pr.189 (selection of the input terminal function) to assign Simple position pulse train sign
(NP).
• Select the command pulse train with Pr.428 Command pulse selection.
• Select vector control or PM sensorless vector control to select the position control method.
NOTE
• If Pr.419= "2" (simple pulse train position command) is set, the terminal JOG is used for the simple position pulse train input
regardless of the Pr.291 Pulse train I/O selection pulse train input/output selection setting.
Clear signal selection (Pr.429, CLR signal)
• This function is useful to reset the number of droop pulses to 0 when home position return is performed.
• If the simple position droop pulse clear (CLR) signal is turned ON when Pr.429 Clear signal selection (clear signal
selection)= "0", the deviation counter is cleared at the edge of the signal. The Simple position droop pulse clear CLR signal
is also turned ON in synchronization with the zero pulse signal of the encoder such as the home position return signal, and
the deviation counter is cleared.
• For a terminal used for the CLR signal, set "69" in any of Pr.178 to Pr.189 (input terminal function selection) to assign
the function.
Pr.428 setting Command pulse train type During forward rotation During reverse rotation
0 to 2
Negative
logic
Pulse train + rotation
direction sign
3 to 5
Positive
logic
Pulse train + rotation
direction sign
Actual rotation
Forward rotation
Reverse rotation
Base signal
Operation ready completion (RDY)
Forward stroke end (STF)
Reverse stroke end (STR)
Inverter pulse train command
Sign signal (NP)
In-position (Y36)
Servo on (LX)
0.1s
JOG
NP
H
L
JOG
NP
H
L
Deviation counter
image
CLR
ON
When Pr. 429 = "0" When Pr. 429 = "1 (initial value)"
Deviation counter
image
CLR
ON
Counter clear while ONCounter clear at the edge of
turning on of the signal