Macros
9-108 Chapter 9
a critical process such as a high speed filling cycle. Also remember to set the A/D interval back to a short
interval after the macro routine is complete.
Specifying an A/D interval does not guarantee that the interval will be achieved. For example, it is not
possible to achieve 60 updates per second on four scales simultaneously even if you specify this interval.
However, it is possible to obtain 60 updates per second on any one scale by reducing the interval of the
others.
Setpoint status is not updated between A/D intervals. Do not specify a long interval during
a critical I/O process!
Get A/D Interval
G < scale# > %r
The get A/D interval command copies the current A/D conversion rate for the specified scale to the entry
buffer.
Wait for A/D Interval
W < scale# > %r
Suspends macro execution until the next A/D interval for the specified scale occurs. This command is
typically used immediately following a tare function to ensure that all affected weight parameters have been
recalculated before checking the result of the tare. This is especially important in batching applications
where a tare is performed prior to loading each ingredient. The example - Waiting for the Next A/D Interval
demonstrates the potential problem of activating the fill output for next ingredient.
The wait for A/D interval command can also be used to temporarily "freeze" weight values. This is
accomplished by waiting for the next A/D interval, then immediately setting a longer interval. Then wait for
the next interval before restoring the original interval duration. Again, it is important to remember that
setpoint status will also remain unchanged during this interval.
G1%r
Copies the A/D interval for scale #1 to the entry
buffer.
G2%r
Copies the A/D interval for scale #2 to the entry
buffer.
G3%r
Copies the A/D interval for scale #3 to the entry
buffer.
G4%r
Copies the A/D interval for scale #4 to the entry
buffer.
G1%r=80.6P%o
Copies the A/D interval of scale #1 to the entry
buffer, then stores the value in VAR#6.
G3%r>10%o
Copies the A/D interval of scale #3 to the entry
buffer, then determines if it is greater than 10.
Example:
Waiting for the Next A/D Interval
This macro example demonstrates the need to wait
for the next A/D interval before activating a
setpoint based on the net weight. Without the wait
command, it is uncertain that the next A/D interval
would occur immediately after the tare function.
Thus the net weight would not be updated and
consequently the fill output may have deactivated
if the previously reported net weight exceeded the
new ingredient target.
===================================
MACRO #6 - START PRESS
%t tare scale
W1%r wait for A/D interval
1%A activate fill output
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