Mitsubishi Electric 800 Series Instruction Manual page 225

Position control under vector control
Interface between the position module and the inverter.
• To operate an inverter using a positioning module, the interfaces for the position command pulse train must agree with each
other.
Output form
Open collector
Differential line driver
Selecting the pulse train type (Pr.428)
• To select the pulse train input to the FR-A8AL, set "1" in Pr.419 after installing the FR-A8AL on the inverter.
• 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
224
PARAMETERS
Hardware
Connect
Command unit
externally
PP(NP)
*: Wiring length : max. 2 m
Command unit
Do not
connect
PP(NP)
PGP
*: Wiring length : max. 10 m
During forward During reverse
rotation rotation
PP
NP
PP
L
NP
H
PP
NP
PP
NP
PP
L
NP H
PP
NP
Inverter (FR-A8AL)
+24
VDD
OPC
SD
Inverter (FR-A8AL)
+24
VDD
OPC
(PGN)
Setting of
Pr.428
RD75 (CW/CCW mode)
0 (initial Note: When (CW/CCW mode) and (PULSE/
value) SIGN mode) are connected incorrectly, the
motor moves only one direction.
1 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
2 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.
3
4
The number of pulses are multiplied by 4 to
count. When differential line driver is used,
the number of pulses after the number
5 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.
Input pulse frequency
Max 200k pulses/s
Max 500k pulses/s
Remarks