During position control under Vector control, if "1110" is set in Pr.419 while the FR-A8APS is not installed (or is disabled), a protective function
(E.OPT) is activated.
• Connection with the positioning module of RD75P type MELSEC iQ-R series is also available.
MELSEQ iQ-R RD75P
The pin number differs according to the encoder used. Speed control, torque control, and position control by pulse train input are available with
or without the Z-phase being connected.
Connect the encoder so that there is no looseness between the motor and motor shaft. Speed ratio must be 1:1.
Earth (ground) the shield of the encoder cable to the enclosure using a tool such as a P-clip. (Refer to
For the complementary, set the terminating resistor selection switch to the OFF position (initial status). (Refer to
A separate external power supply of 15 V is necessary according to the encoder power specification. When the encoder output is the differential
line driver type, only 5 V can be input. When the 24 V power supply of the FR-A8AL is used, the power is supplied to the encoder through terminal
PG24. When the 5 V/12 V power supply of the FR-A8AL is used, the power is supplied to the encoder through terminal PGV. Do not use the
external power supply simultaneously with the 5 V/12 V power supply or the 24 V power supply. Make the voltage of the external power supply
the same as the encoder output voltage, and connect the external power supply between terminals PG and SD.
Assign the function using Pr.178 to Pr.184, Pr.187 to Pr.189 (input terminal function selection).
The pulse signal from the position module is available for both open collector and differential line driver. However, the connections are different.
(The following figure shows an example for differential line driver.) For the connection method, refer to the Instruction Manual of the FR-A8AL.
5.5 Position control under vector control and PM sensorless vector control
Forward stroke end
Reverse stroke end
Pre-excitation (servo on)
( ± 10V)