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19 BUILT-IN I/O FUNCTION
19.1 High-speed Counter Function
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High-speed counter number of pulses per rotation
These devices set the number of pulses per rotation for rotational speed measurement mode.
■Corresponding devices
The device numbers corresponding to each channel are as follows.
■Description
These devices set the number of pulses per rotation when a high-speed counter operates in rotational speed measurement
mode. The rotational speed is measured with the set value.
• If the value is modified while the high-speed counter is operating, the rewritten value is reflected after the
measurement before the value was modified is finished.
• These devices do not operate when the FX3 compatible high-speed counter function is valid.
■Clear timing
The timing when the device is cleared is as follows.
• Power ON, Reset, STOPRUN
Precautions
If the set value for the number of pulses per rotation is set to less than the lower limit value or more than the upper limit value,
the number of pulses per rotation operates at the lower limit value or the upper limit value. However, the set value is stored as
is.
High-speed comparison table (high-speed compare instruction) error occurrence error
code
This device stores the high-speed comparison table, high-speed comparison instruction error.
■Corresponding devices
The device number is shared for all channels.
■Description
This device stores the error code when an error occurs in the high-speed comparison table, high-speed comparison
instruction.
These devices also operate when the FX3 compatible high-speed counter function is valid.
■Clear timing
The timing when the device is cleared is as follows.
• Power ON, Reset, SM50 turned ON
■Error code
Over the upper limit of the number of instructions driven at the same time: 1811H
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
SD4519,
SD4518
SD4549,
SD4548
SD4579,
SD4578
SD4609,
SD4608
SD4639,
SD4638
SD4669,
SD4668
SD4699,
SD4698
SD4729,
SD4728
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
SD4982