Mitsubishi FX1S Series Programming Manual page 202

FX Series Programmable Controlers
c) The acceleration time must conform to the limitations described below.
d) The output device is limited to Y000 or Y001 only and should be transistor type.
e) Two FNC 59 (PLSR) can be used at the same time in a program to output pulses to Y000
and Y001 respectively. Or, only one FNC 57 PLSY and one FNC 59 PLSR can be used
together in the active program at once, again outputting independent pulses to Y000 and
Y001.
It is possible to use subroutines or other such programming techniques to isolate different
instances of this instructions. In this case, the current instruction must be deactivated before
changing to the new instance.
f) If the number of pulses is not enough to reach the maximum frequency then the frequency is
automatically cut
g) Special auxiliary coil M8029 turns ON when the specified number of pulses has been
completed. The pulse count and completion flag (M8029) are reset when the PLSR
instruction is de-energized.
Acceleration time limitations
The acceleration time S
determined by other parameters of the system according to the following 4 points.
1) Set S3 to be more than 10 times the maximum program scan time (D8012).
If set to less than this, then the timing of the acceleration steps becomes uneven.
2) The following formula gives the minimum value for S
3) The following formula gives the maximum value for S
4) The pulse output always increments in 10 step up to the maximum frequency as shown on
the previous page.
If the parameters do not meet the above conditions, reduce the size of S
• Possible output frequency is limited to 2 to 20,000 Hz for FX
100,000Hz for FX
are outside this limit then they are automatically adjusted to bring the value back to the
limit.
• If the drive signal is switch off, all output stops. When driven ON again, the process starts
from the beginning.
• Even if the operands are changed during operation, the output profile does not change.
The new values take effect from the next operation.
has a maximum limit of 5000 ms. However, the actual limits of S
3
90000
≥
S
3
S
S
2
≤
S
3
S
1
/FX . If either the maximum frequency or the acceleration step size
1S 1N
×
5
1
.
3
.
3
×
818
Applied Instructions 5
are
3
.
1
/FX , and 10 to
2N 2NC
5-82