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24 HIGH-SPEED INPUT/OUTPUT FUNCTION
24.2 FX3-compatible high-speed counter function
LC device
: High-speed transfer capable (special relay is immediately updated)
: Normal transfer capable (special relay is updated in END processing)
: Transfer not possible (read-only)
Precautions when using FX3-compatible high-speed counters
Shown below are the precautions for using the FX3 compatible high-speed counter. For any other precautions, see the
precautions for each function.
• When the FX3 compatible function is valid, it is possible to specify the LC device in (s1) of the DHSCS instruction/DHSCR
instruction and (s) of the DHSZ instruction. If an LC device that is not used as high-speed counter is specified, an error
occurs, and the DHSCS instruction, the DHSCR instruction, and the DHSZ instruction do not operate.
• Set up the table with the CH number of the counter if the table number of the high-speed comparison table/the multi-point
output high-speed comparison table needs to be specified.
• To clear the current value of the LC device, use the DHCMOV instruction or the RST instruction to clear it.
• Use the latch setting to use LC35 to LC55 with the high-speed counter of the FX3 compatible function.
• The reset coil of the LC device is cleared when the power is set from OFF to ON.
• For the functions that share inputs with FX3-compatible high-speed counter function, refer to Page 248 Functions that
share inputs and outputs.
LC device Function Compatible with
DHCMOV
instruction
Compatible with
DMOV instruction
(s) (d) (s) (d)
LC35 High-speed counter current value (CH1)
LC36 High-speed counter current value (CH2)
LC37 High-speed counter current value (CH3)
LC38 High-speed counter current value (CH4)
LC39 High-speed counter current value (CH5)
LC40 High-speed counter current value (CH6)
LC41 High-speed counter current value (CH1)
LC42 High-speed counter current value (CH3)
LC43 High-speed counter current value (CH5)
LC44 High-speed counter current value (CH1)/High-speed counter current value (CH7)
LC45 High-speed counter current value (CH3)/High-speed counter current value (CH8)
LC46 High-speed counter current value (CH1)
LC47 High-speed counter current value (CH1)
LC48 High-speed counter current value (CH4)
LC49 High-speed counter current value (CH1)
LC50 High-speed counter current value (CH4)
LC51 High-speed counter current value (CH1)
LC52 High-speed counter current value (CH1)
LC53 High-speed counter current value (CH4)
LC54 High-speed counter current value (CH1)/High-speed counter current value (CH7)
LC55 High-speed counter current value (CH4)
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