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6. PROGRAMMING
- I
, ~ .
.
MELSHbA
(c) Stop signal reset
A start signal (Y10,
Y l 1, Y12) is only valid
at its leading edge,
therefore if it is already on when the stop signal is reset the process
will not restart.
(d) M code
The conditions shown in Table 6.10 turn off the M code ON signal at
the relevant axis. When the PC ready signal is turned off, the M code
is set to "0".
(e) Stop during interpolation operations
During interpolation operations, both axes can be stopped by either
the X-
or
the Y-axis stop signal. However, when interpolation and
independent operations are combined in the start data number auto-
matic switching (pointer setting), the axis stops as shown below
at
the point update. Therefore, after going to independent positioning,
the stop signal is only valid for the self axis.
Point update
Pattern 01
Pattern 00
L
-
-
-
Dwell
Dwell
A
B
C
4
9 -
(Interpolation
operation)
(Dual
0peration)l
I
stop signal
ON
during A
Both axes are stopped.
Stop signal ON
during C
Conditions
The other axis is not
BUSY. Or the other
axis is executing inde-
pendent positioning
of B.
The self axis is
stopped.
Both axes are
stopped.
The other axis is not
executed positioning
1
of B.
Flg. 6.11
Stop During Interpolation
(2)
Other stop signals
In addition to the four stop signals in Table 6.9, the following also stop
processing while the AlSD71 is BUSY.
For
all the following, positioning
is decelerated to a stop and the peripheral device displays an error
message.
Table 6.10 Stop Signals
Independent
Valid
Signal
operation
Relevant
I
Other
Operation
axis
axis
Inter-
polation
Item
Ready signal from drive unit OFF
0
0
0
A 1 SD71 bus error
0
0
0
Operation error (8231 error)
0
-
0
6-40
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