7 Applied Instructions
7.6 High Speed Processing
320
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
2. Total number of output pulses
Set the total number of output pulses specified by as follows.
•For FX
3U and FX3UC PLCs : 16-bit instruction→1 to 32,767PLS
32-bit instruction→1 to 2,147,483,647PLS
•For FX
3G PLC : 16-bit instruction→110 to 32,767PLS
32-bit instruction→110 to 2,147,483,647PLS
•For FX
2N and FX2NC PLCs : 16-bit instruction→110 to 32,767PLS
32-bit instruction→110 to 2,147,483,647PLS
When setting a value less than "110", the operation is as follows.
PLC version V3.00 or before : The pulses are not generated normally.
PLC version V3.00 or later : One tenth of the maximum frequency is generated.
If the maximum frequency is 100 Hz or less, "10 Hz" is generated.
•For FX
1S, FX1N and FX1NC PLCs : 16-bit instruction→110 to 32,767(PLS)
32-bit instruction→110 to 999,999(PLS)
When setting a value less than "110", the pulses are not generated normally.
3. Acceleration/deceleration time
Set the acceleration/deceleration time specified by as follows.
For FX
3U, FX3UC and FX3G PLCs: 50 to 5000 (ms)
For FX2N and FX2NC PLCs: 5000 (ms) or less
Follow, however, the conditions a) through d).
a) Make the acceleration/deceleration time be 10 times or more the PLC's maximum scan time (value of
D8012 or greater). If set to less than 10 times, the acceleration/deceleration timing becomes instable.
b) The following equation defines the allowable minimum that can be set as the acceleration/
deceleration time.
If setting a value less than the equation indicates, the error in the acceleration time becomes large. If
set to less than "90000/ , operation takes place while rounding it up to "90000/ ".
c) The following equation defines the allowable maximum that can be set as the acceleration/
deceleration time.
d) The number of speed changes (steps) for the acceleration/deceleration is fixed to "10 times" as shown
in the previous page.
If unable to set the PLC to these conditions, lower the maximum frequency specified by .
•For FX1S, FX1N and FX1NC PLCs: 50 to 5000(ms)
4. Pulse output
• Only a transistor output on the main unit or Y000 or Y001 on a special high speed output adapter
*1
can be
specified in .
*1. Special high speed output adapters can be connected only to the FX
3U PLC.
When using the PLSR instruction with a relay output type FX
3U PLC, a special high speed output
adapter is required.
• The duration of the ON/OFF pulses is 50% (ON = 50%, OFF = 50%)
• The pulse output is controlled by the dedicated hardware not affected by the sequence program (operation
cycle).
• If the command input is set to OFF during continuous pulse output, the output from the device specified by
turns OFF.
5. Specifying input and output variables
When handling 32-bit data in a structured program, a 16-bit device cannot be specified directly as in the case
of a simple project. Use a label to handle 32-bit data.
A 32-bit counter can be specified directly as it is a 32-bit long device.
Use a global label to specify a device.
90000
s1
s3
5
≥
×
≤
×
s1
s3
818
s2
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