Position Control By Pulse Train Input To The Inverter - Mitsubishi Electric FR-A800 Series Instruction Manual

• The command pulse is switchable according to the position module as shown in the following table.
Command pulse train type
Forward pulse
train
Reverse pulse
train
Pulse train + sign
Negative
logic
A phase pulse
train
B phase pulse
train
Forward pulse
train
Reverse pulse
train
Pulse train + sign
Positive
logic
A phase pulse
train
B phase pulse
train
5.5.6
Vector Vector Vector PM PM PM
The simple position pulse train command can be input by pulse train input and simple position pulse train signal (NP) to the
JOG terminal.
Pr.
419 Position command source
B000 selection
428
Command pulse selection 0
B009
 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 second. When the LSP signal (forward stroke end) or the LSN signal (reverse
stroke end) 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.
• To use the LSP or LSN signal, set the corresponding number in the following table in any of Pr.178 to Pr.189 (Input
terminal function selection) to assign the function to an input terminal. When the LSP and LSN signals are not assigned,
the STF signal is used as the forward stroke end signal, and the STR signal is used as the reverse stroke end signal.
Pr.178 to Pr.189 setting
88
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During forward
rotation
PP
NP
PP
L
NP
PP
NP
PP
NP
PP
NP H
PP
NP

Position control by pulse train input to the inverter

Name Initial value
0
Signal
LSP
LSN
search engine
During reverse Setting of
rotation Pr.428
0 (initial value)
1
H
2
3
4
L
5
Setting range
0, 10, 100, 110,
Simple position control by point table (Settings are available for
200, 210, 300,
the home position data at servo-OFF, clearing of the current
310, 1110,
position 2 monitor value, and the absolute position control.)
1310
1 Position command given by the FR-A8AL pulse train input
Simple pulse train position command given by the pulse train
2
input to the inverter
0 to 2
Pulse train + rotation direction
sign
3 to 5
5.5 Position control under vector control and PM sensorless vector control
Remarks
RD75 (CW/CCW mode)
Note: When (CW/CCW mode) and (PULSE/
SIGN mode) are connected incorrectly, the
motor moves only one direction.
RD75 (PULSE/SIGN mode)
The number of pulses are multiplied by 4 to
count. When differential line driver is used,
the number of pulses after the number
encoder pulses is quadruplicated should be
500k pulses/s or lower. When open collector
is used, the number should be 200k pulses/s
or lower.
The number of pulses are multiplied by 4 to
count. When differential line driver is used,
the number of pulses after the number
encoder pulses is quadruplicated should be
500k pulses/s or lower. When open collector
is used, the number should be 200k pulses/s
or lower.
Description
Negative logic
Positive logic
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10
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