Delta AS Series Programming Manual page 1177

AS Ser ies Pro gra mm in g M anu al
9. When the limit switch is specified in HWCONFIG, and there is an external input interrupt service program, the
interrupt program will be executed at the same time.
10. The instruction cannot be used in the ST programming language, interrupt tasks or function block which is called
only once.
The steps for performing the functions are as below
Function code 0:
 The DZRN function is executed and the search for the zero point is in the negative direction with the target
frequency.
 After the DOG signal is received, the output frequency decreases to the JOG frequency. The output continues in
the negative direction and does not stop until the zero point signal changes from ON to OFF.
 The output stops when the signal changes from ON to OFF and the axis moves away from the DOG signal.
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Function code 1:
 The DZRN function is executed and the search for the zero point is in the negative direction with the target
frequency.
 After the DOG signal is received, the output is in the positive direction with the JOG frequency after the output
frequency decreases, and the motion direction reverses. The output does not stop until the zero point signal
changes from ON to OFF.
 The axis moves away from the DOG signal and PLC stops when the signal changes from ON to OFF.
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Completion flag
DOG signal
Frequen cy
Target frequency
JOG frequency
1
Negative direction
ON
2
ON
Time
3