Chapter 6 Applied Instructions Note 5: UP: single phase count-up input (same as CW), DN: single phase count-down input (same as CCW) The high-speed counters between HC200–HC255, are reserved devices inside PLC and are not listed in this table. It is not recommended to use these counters in a program. The following table lists the high-speed counter, function, reset, reversing, and counting mode. 6_ 6-279 HC251 UP DN HC252 P HC253 P Count-up/count-down function Starting the Reversing the Counting mode Reset function direction HC No. SM No. Attribute Explanation SM No. SM No. SR No.
HC200 SM300 R/W Show/ set SM291 SM281 （Applicable for HC201） SR190 HC201 SM301 R Show HC202 SM302 R Show HC204 SM304 R/W Show/ set SM292 SM282 （Applicable for HC205） SR191 HC205 SM305 R Show HC206 SM306 R Show HC208 SM308 R/W Show/ set SM293 SM283 （Applicable for HC209） SR192 HC209 SM309 R Show HC210 SM310 R Show HC212 SM312 R/W Show/ set SM294 SM284 （Applicable for HC213） SR193 HC213 SM313 R Show HC214 SM314 R Show HC216 SM316 R/W Show/ set -- SM285 （Applicable for HC217） SR194 HC217 SM317 R Show HC218 SM318 R Show HC220 SM320 R/W Show/ set -- SM286 （Applicable for HC221） SR195 HC221 SM321 R Show HC222 SM322 R Show HC232 SM332 R/W Show/ set -- SM287 （Applicable for SR196 HC233 SM333 R Show