Mitsubishi Electric FX3G SERIES Programming Manual page 360

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2. Only 32-bit operation instructions are available.
Because instructions for high-speed counters are dedicated to 32 bits, make sure to input "DHSCR (FNC 54)".
3. Priority order in operation among HSCS (FNC 53), HSCR (FNC 54), and HSZ (FNC 55)
instructions for the same high-speed counter
→ For details, refer to "6. Priority order in operations among HSCS (FNC 53), HSCR (FNC 54), and HSZ
4. Reset operation by an external terminal
→ For details, refer to "5. Reset operation by an external terminal [M8025*1: HSC (external reset) mode]" in
5. Other cautions on using HSCR instruction
Program example
1. Example of self-reset circuit
When the current value of C255 becomes "400", C255 is immediately reset. Its current value becomes "0", and the
output contact is set to OFF.
M8000
C255
RUN monitor
358
(FNC 55) instructions for the same high-speed counter" in Subsection 13.4.1.
K300
FNC 54
K400 C255
DHSCR
Comparison Comparison
value source
13 High-Speed Processing – FNC 50 to FNC 59
13.5 FNC 54 – HSCR / High-Speed Counter Reset
Reset value of DHSCR
Count-up value
C255
Current value
Output
of C255
destination
Output contact
of C255
Subsection 13.4.1.
→ For details, refer Subsection 13.4.1.
400
300