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19 BUILT-IN I/O FUNCTION
19.1 High-speed Counter Function
161
19
Special relays/special registers capable of high-speed transfers
with the HCMOV instruction
The table below shows the devices that can read and write the latest value with the HCMOV instruction from special relays
and special registers related to the high-speed counters. When special relays and special registers are specified for (s) and
(d) of instructions other than the HCMOV instruction, the operation is the same as one compatible with the MOV instruction.
Special relays for individual channels
: High-speed transfer capable (special relay is immediately updated)
: Normal transfer capable (special relay is updated in END processing)
: Transfer not possible (read-only)
Special relays shared by all channels
: High-speed transfer capable (special relay is immediately updated)
: Normal transfer capable (special relay is updated in END processing)
: Transfer not possible (read-only)
Special relay Function Compatible with HCMOV
instruction
Compatible with MOV
instruction
(s) (d) (s) (d)
SM4500 to
SM4507
High-speed counter operating
SM4516 to
SM4523
High-speed counter pulse density/rotational speed being measured
SM4532 to
SM4539
High-speed counter overflow
SM4548 to
SM4555
High-speed counter underflow
SM4564 to
SM4571
High-speed counter (1-phase 2-input, 2-phase 2-input) count
direction monitor
SM4580 to
SM4587
High-speed counter (1-phase 1-input S/W) count direction switch
SM4596 to
SM4603
High-speed counter preset input logic
SM4612 to
SM4619
High-speed counter preset input comparison
SM4628 to
SM4635
High-speed counter enable input logic
SM4644 to
SM4651
High-speed counter ring length setting
Special relay Function Compatible with HCMOV
instruction
Compatible with MOV
instruction
(s) (d) (s) (d)
SM4980 High-speed comparison table (high-speed compare instruction)
operation
SM4982 High-speed comparison table (high-speed compare instruction) error
occurrence
SM5000 Multi-point output high-speed comparison table operation
SM5001 Multi-point output high-speed comparison table completion