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6. PROGRAMMING
M E k S E G A
PC ready reset
When an error is detected in the sequence program, create a program so
that the PC ready signal (Y2D) is reset by detecting the error.
A I SD71 ready
Following time
(1)
is needed to turn ON the AlSD71 ready signal (X11)
after checking parameter and zero return data when a
PC ready signal
(Y2D) is switched from OFF to ON.
PC
ready signal (Y2D)
AlSD71 ready signal (X1 1 )
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When switching the positioning mode, the PC ready signal (Y2D) must
be turned OFF. (When the PC ready signal (Y2D) goes OFF, positioning
mode data is written to the AlSD71.)
Therefore, after switching the positioning mode, the positioning start time
will be delayed.
Zero return
Be sure to execute zero return when turning the power ON.
(The current values
of the positioning module cannot be guaranteed
when turning the power ON.)
Limit switch for near-point dog
Use a limit switch with high contact reliability.
If
the near-point dog signal
is not input during zero return, the movement continues at the zero return
speed.
Overrun processing
Overrun is prevented in the upper/lower strokes by limit setting. However,
this applies when the
AlSD71 is operating normally. For safety,
Mitsubishi recommends setting a marginal limit switch
and external
circuit that turns OFF power to the motor power when the limit switch
goes ON.
Emergency stop
The STOP input signal is a positioning deceleration stop signal which
cannot be used for an emergency stop. Stop the drive unit by external
contact in the case of an emergency stop.
Upper/lower stroke limit values
Confirm whether correct upper/lower stroke limit values have been set.
Speed limit value
Confirm whether a proper speed limit has been set to a parameter.
Do not set the high speed at the JOG speed.
Execute operations at the low JOG speed.
Speed during interpolation operations
The speed during interpolation operations is decided with
the
X
and Y
axes. Therefore, set the speed of both axes correctly so that either axis
operates at the setting speed or lower.
6 - 4
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