LK3U PLC High-speed counter instructions
| Counter number | Distinguish | Input terminal assignment | ||||||||
| X000 | X001 | X002 | X003 | X004 | X005 | X006 | X007 | |||
| One-way single count input | C235 | H/W | U/D | |||||||
| C236 | S/W | U/D | ||||||||
| C237 | S/W | U/D | ||||||||
| C238 | H/W | U/D | ||||||||
| C239 | S/W | U/D | ||||||||
| C240 | S/W | U/D | ||||||||
| C241 | H/W | U/D | R | |||||||
| C242 | S/W | U/D | R | |||||||
| C243 | S/W | U/D | R | |||||||
| C244 | H/W | U/D | R | S | ||||||
| C245 | S/W | U/D | R | S | ||||||
| One-way double count input | C246 | S/W | U | D | ||||||
| C247 | S/W | U | D | R | ||||||
| C248 | S/W | U | D | R | ||||||
| C249 | S/W | U | D | R | S | |||||
| C250 | S/W | U | D | R | S | |||||
| Two-way double count input | C251 | H/W | A | B | ||||||
| C252 | H/W | A | B | R | ||||||
| C253 | H/W | A | B | R | ||||||
| C254 | H/W | A | B | R | S | |||||
| C255 | H/W | A | B | R | S | |||||
| H/W: hardware counter | S/W：Software Counter | U：increase counter input | D：down counter input | |||||||
| A：Phase A input | B：Phase B input | R：external reset input | S：external start input | |||||||
| * Only X0-X5 supports high-speed input function, X6 and X7 do not support high-speed input function. | ||||||||||
| DHSCS, DHSCR, DHSZ instruction | ||||||||||
| * Three high-speed comparison instructions, the maximum number of simultaneous driving: 4 times (greater than 4 reports 6705); | ||||||||||
| *When using hardware high-speed counter comparison, the response frequency does not change; DHSCS and DHSCR are performing real-time comparison; however, the interval comparison of DHSZ hardware is not real-time, but about 5us comparison; | ||||||||||
| * When using the hardware high-speed counter, as long as DHSCS, DHSCR, DHSZ are driven, the comparison result will be output; | ||||||||||
* When using the software high-speed counter, the comparison is performed only when the high-speed counter has input; LK3U PLC-Communication port pin definition LK3U PLC Supported instructions LK3U PLC Special relay M function description LK3U PLC Special register D function description LK3U PLC High-speed counter instructions LK3U PLC High-speed counter instructions | ||||||||||