Special Relays/Special Registers Capable Of High-Speed Transfers With The Hcmov/Dhcmov Instruction - Mitsubishi Electric FX5 User Manual
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Special relays/special registers capable of high-speed transfers
with the HCMOV/DHCMOV instruction
The table below shows the devices that can read and write the latest value with the HCMOV/DHCMOV 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/DHCMOV instruction, the operation is the same as one
compatible with the MOV/DMOV instruction.
Precautions
• Transfer is not possible between an SM supporting high-speed transfer and an SD supporting high-speed transfer.
• When the device supporting high-speed transfer is set as the transfer source (s) by the DHCMOV instruction while the high-
speed input/output function is stopped, the previous value before stop is read out. However, if the function is not executed
even once, the initial value is read out.
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 relay Function
SM4500 to
High-speed counter operating
SM4515
SM4516 to
High-speed counter pulse density/rotational speed being measured
SM4531
SM4532 to
High-speed counter overflow
SM4547
SM4548 to
High-speed counter underflow
SM4563
SM4564 to
High-speed counter count direction monitor
SM4579
SM4580 to
High-speed counter (1-phase 1-input S/W) count direction switch
SM4595
SM4596 to
High-speed counter preset input logic
SM4611
SM4612 to
High-speed counter preset input comparison
SM4627
SM4628 to
High-speed counter enable input logic
SM4643
SM4644 to
High-speed counter ring length setting
SM4659
*1 In a program with interruption priority 1, the HCMOV/DHCMOV instruction specified with a device for the high-speed pulse input/output
module cannot be executed.
*1
*1
*1
*1
Compatible with HCMOV/
Compatible with MOV/
DHCMOV instruction
DMOV instruction
(s)
(d)
(s)
24 HIGH-SPEED INPUT/OUTPUT FUNCTION
24.1 High-speed Counter Function
(d)
24
243
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