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3 SPECIFICATIONS AND FUNCTIONS
CW
CWW
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(2) Output signal ON/OFF status
In the QD70D, the logic setting for the output signal ON/OFF status is defined as
described below.
Before connecting the QD70D to a servo amplifier, confirm the input
specifications of the servo amplifier and perform the logical setting on the
QD70D.
(a) When a photocoupler is used for input on the servo amplifier side
QD70D
When the QD70D uses negative-true logic, the OFF status of the
photocoupler is defined as "Output signal OFF".
When it uses positive-true logic, the ON status of the photocoupler is
defined as "Output signal OFF".
(b) When a differential receiver is used for input on the servo amplifier side
QD70D
When the QD70D uses negative-true logic, the "L" state of the differential
receiver is defined as "Output signal OFF".
When it uses positive-true logic, the "H" state of the differential receiver is
defined as "Output signal OFF".
Example)
When output signals are set to negative-true logic and CW/CCW:
Pulse train is output so that, when the output signal turns off, the
photocoupler turns off or the differential receiver is in "L" state.
OFF
QD70D's output signal
ON
Pulse train output from
QD70D's outoput terminal*
PULSE F +
PULSE F -
OFF
QD70D's output signal
ON
Pulse train output from
QD70D's outoput terminal*
PULSE R +
PULSE R -
*: PULSE F+/- and PULSE R+/- are waveforms based on PULSE F COM
and PULSE R COM respectively.
Servo Amplifier
Servo Amplifier
Forward fotation
MELSEC-Q
Reverse rotation
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