Inovance H3U Series - Page 508

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7
7 Motion Control
DRVZ: Mechanical zero return
② The creep speed ranges from 10 to 32,767 Hz.
③ The base speed ranges from 10 to 32,767 Hz.
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When the PLC works in combination with the servo driver, this instruction is used to output pulses at
the pulse speed specied by the special register through the pulse output port, so that the actuator
moves to the action origin according to the preset action sequence; when the near point signal (DOG)
switches from ON to OFF during running, and the origin signal switches from OFF to ON, the PLC
immediately stops outputting the pulse. A clearing signal is output when regression is nished.
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In a system with forward/reverse rotation limit, the DSZR with DOG search mode can be enabled. In
a system without forward/reverse rotation limit or not using the forward/reverse rotation limit for zero
return, the zero return can be performed by specifying the zero return direction.
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You can set the zero return direction ag to ON or OFF to specify the zero return direction. The base
speed is accelerated to the zero return speed and the actuator moves toward the direction specied
by the zero return direction ag. When the system detects that the near point signal (DOG) is ON, the
system decelerates to the creep speed. After the near point signal (DOG) switches from ON to OFF,
if the system detects that the origin signal switches from OFF to ON, the system stops outputting the
pulse immediately.
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After the pulse output stops (within 1 ms), the clearing signal keeps ON within 20 ms. The zero return
action is nished.
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This is the description about the case where the logical inversion ag of the near point signal and
the origin signal is set to OFF. If the logical inversion ag is set to ON, the ON and OFF states of the
corresponding near point signal and origin signal must be changed to each other.
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The following is a single axis pulse output diagram.
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DOG search
Under the circumstance that there’re forward/reverse limits in the system, when the zero return instruction
with DOG search function is executed, the zero return action is subject to the start position of zero return