Mitsubishi Electric MELSEC iQ-F FX5 - Special relays;LC devices capable of high-speed transfers with the HCMOV;DHCMOV instruction

300
25 HIGH-SPEED INPUT/OUTPUT FUNCTION
25.2 FX3-compatible High-speed Counter Function
Parameters are enabled when the CPU module is powered ON or after a reset.
Special relays/LC devices capable of high-speed transfers with
the HCMOV/DHCMOV instruction
Shown below are the special relay/LC device that can read and write the latest value with the HCMOV/DHCMOV instruction
when the FX3 compatible high-speed counter function is valid. When special relays and LC devices are specified for (s) and
(d) of instructions other than the HCMOV/DHCMOV instruction, the operation is the same as that of the MOV/DMOV
instruction.
The same operation as when the FX3 compatible high-speed counter is not valid is made for the special relay/special register
capable of high-speed transfers with the HCMOV/DHCMOV instruction other than those described in the list below. (Page
285 Special relays/special registers capable of high-speed transfers with the HCMOV/DHCMOV instruction)
Special relay
: High-speed transfer capable (special relay is immediately updated)
: Normal transfer capable (special relay is updated in END processing)
: Transfer not possible (read-only)
Input logic Sets preset input logic when preset input is enabled. • Positive Logic
• Negative Logic

Preset Value Not available for FX3-compatible high-speed counters. 
Input Comparison Enable/
Disable
Sets whether to "enable" or "disable" input comparison
when preset input is enabled.
• Disable
• Enable

Control Switch Sets preset execution timing when preset input is enabled. • Rising
• Falling
• Rising + Falling Edge
• Always During Input ON

Enable Input Enable/
Disable
Not available for FX3-compatible high-speed counters 
Input logic
Ring Length Enable/
Disable
Ring Length
Measurement Unit Time
No. of Pulse per Rotation
Special relay Function Compatible with HCMOV/
DHCMOV instruction
Compatible with MOV/
DMOV instruction
(s) (d) (s) (d)
SM8246 LC46 counting direction monitoring 
SM8247 LC47 counting direction monitoring 
SM8248 LC48 counting direction monitoring 
SM8249 LC49 counting direction monitoring 
SM8250 LC50 counting direction monitoring 
SM8251 LC51 counting direction monitoring 
SM8252 LC52 counting direction monitoring 
SM8253 LC53 counting direction monitoring 
SM8254 LC54 counting direction monitoring 
SM8255 LC55 counting direction monitoring 
Item Description Setting range Default