FX Series Programmable Controlers Applied Instructions 5
5-64
d) The output device is limited to Y0 or Y1 onl
and should be transistor t
pe.
e) This instruction can onl
be used once within a pro
ram scan. Also, onl
one of either FNC
57 PLSY or FNC 59 PLSR can be in the active pro
ram at once.
f) If the number of pulses is not enou
h to reach the maximum frequenc
then the frequenc
is
automaticall
cut
) Special auxiliar
coil M8029 turns ON when the specified number of pulses has been
completed. The pulse count and completion fla
(M8029) are reset when the PLSR
instruction is de-ener
ized.
h)
Acceleration time limitations
The acceleration time S
3
has a maximum limit of 5000 ms. However, the actual limits of S
3
are
determined b
other parameters of the s
stem accordin
to the followin
4 points.
1) Set S3 to be more than 10 times the maximum pro
ram scan time (D8012).
If set to less than this, then the timin
of the acceleration steps becomes uneven.
2) The followin
formula
ives the minimum value for S
3
.
3) The followin
formula
ives the maximum value for S
3
.
4) The pulse output alwa
s increments in 10 step up to the maximum frequenc
as shown on
the previous pa
e.
If the parameters do not meet the above conditions, reduce the size of S
1
.
It is possible to use subroutines or other such pro
rammin
techniques to isolate differen
instances of this instructions. In this case, the current instruction must be deactivated befor
chan
in
to the new instance.
S
3
≥
S
1
90000
×
5
S
3
≤
S
1
S
2
×
818
• Possible output frequenc
is limited to 2 to 20,000 Hz. If either the maximum frequenc
or
the acceleration step size are outside this limit then the
are automaticall
ad
usted to brin
the value back to the limit.
• If the drive si
nal is switch off, all output stops. When driven ON a
ain, the process starts
from the be
innin
.
• Even if the operands are chan
ed durin
operation, the output profile does not chan
e.
The new values take effect from the next operation.
