Mitsubishi Electric FR-A800, Instruction Manual

Page: 93 / 1042

Installation and wiring Connection of motor with encoder (vector control)
FR-A800 2 - 63
Switches of the FR-A8AP
●
Encoder type selection switch (SW3)
Selects either the differential line driver or complementary setting.
It is initially set to the differential line driver. Switch its position according to the output circuit.
●
Terminating resistor selection switch (SW1)
Selects ON/OFF of the internal terminating resistor.
Set the switch to ON (initial status) when an encoder output type is differential line driver, and set
to OFF when complementary.
ON: with internal terminating resistor (initial status)
OFF: without internal terminating resistor
Fig. 2-45:
Encoder specification selection switch
I002386E
Fig. 2-46:
Terminating resistor selection switch
I002387E
NOTES Set all switches to the same setting (ON/OFF).
Set the switch "OFF" when sharing an encoder with another unit (NC (computerized numerical
controller), etc.) having a terminating resistor under the differential line driver setting.
1 2 3 4
O N
1
2
O
N
SW2
SW3
SW1
Complementary
Differential line
driver (initial status)
1 2 3 4
O N
1
2 O
N
SW2
SW3
SW1 Internal terminating
resistor-OFF
Internal terminating
resistor-ON
(initial status)