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LK3U PLC High-speed counter instructions

Counter numberDistinguishInput terminal assignment
X000X001X002X003X004X005X006X007
One-way single count inputC235H/WU/D
C236S/WU/D
C237S/WU/D
C238H/WU/D
C239S/WU/D
C240S/WU/D
C241H/WU/DR
C242S/WU/DR
C243S/WU/DR
C244H/WU/DRS
C245S/WU/DRS
One-way double count inputC246S/WUD
C247S/WUDR
C248S/WUDR
C249S/WUDRS
C250S/WUDRS
Two-way double count inputC251H/WAB
C252H/WABR
C253H/WABR
C254H/WABRS
C255H/WABRS
H/W: hardware counterS/W:Software CounterU:increase counter inputD:down counter input
A:Phase A input     BPhase B inputR:external reset inputS: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;

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