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3. Input/Output Interface
I/O
Internal circuit
Input
Pin
number
Signal
X
Y
axis
axis
5A 7A Common
Drive unit
ready
( READY )
5B 7B
Stop signal
( STOP )
6A 8A
Zero-point
signal
( DOG)
6B 8B
1A 3A
Enable
signal
1B 3B
2A 4A
Control
switching
signal
2B 4B
9A 10A
Zerophase
signal
( PGO )
9B 10B
5 to 24 VDC (external supply)
(1) LOW indicates the servo drive unit is ready and feed
pulses are receivable.
(2) The A1SD71 checks the drive unit ready signal prior
to start. If not ready, the A1SD71 turns a zero return
rquest ON.
(3) Arrange for drive unit errors, e,g, a control power
error, to set this signal HIGH.
(4) Switching the signal to HIGH during positioning stops
the operation. Resetting the signal will not restart the
operation.
(1) Low to stop positioning. Signal duration 20 msec or
more.
(2) A1SD71 stops positioning by using this signal and
switches the start signal OFF (HIGH). When switching
from HIGH to LOW, positioning is not started.
(1) Used to detect near-point DOG during zero return.
(2) In case of zero phase method of zero returning, a zero
point will be a position where the first zero signal of
resolver is given after the DOG is turned OFF.
(1) Selects the control switching signal enable/disable.
(2) LOW sets enable.
(1) Used as the control switching command in the
velocity/positioning control switching mode.
(2) LOW switches control.
(1) Used as the zero signal at zero return. The zero-
phase grid signal of the pulse encoder is normally
used LOW at zero.
(2) Used when the zero return method uses stopper stop
and zero return complete is extemally input.
Description
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