7 Application Instructions API 50-99 b) There are three counting modes in every HHSC (see the table below): i) 1-phase 1 input refers to “pulse/direction” mode. ii) 1-phase 2 inputs refers to “clockwise/counterclockwise (CW/CCW)” mode. iii) 2-phase 2 inputs refers to “A-B phase” mode. U: Progressively increasing input A: A phase input S: Input started B: Progressively decreasing input B: B phase input R: Input cleared c) In EH2/SV/EH3/SV2 series MPU, there is no limitation on the times of using the hardware high speed counter related instructions, DHSCS, DHSCR and DHSZ. However, when these instructions are enabled at the same time, there will be some limitations.
DHSCS instruction will occupy 1 group of settings, DHSCR 1 group of settings and DHSZ 2 groups of settings. There three instructions cannot occupy 8 and enabled. groups of settings in total; otherwise the system will ignore the instructions which are not the first scanned d) The device used to set or reset a high-speed comparison in EH2/EH3/SV/SV2 should not be a special auxiliary relay, Besides, it can not be a device used by another applied instruction. The 20 devices starting upward from the device used by the applied instruction, and the 20 devices starting downward from the device used by the applied instruction also can not be used.
For example, if DHSCS uses M100 to set a DVP-PLC APPLICATION MANUAL 7-11 Program-interruption Counter Hardware high speed counter type high speed counter Type 1-phase 1 input 1-phase 1 input 1-phase 2 inputs 2-phase 2 inputs C235 C236 C237 C238 C239 C240 C241 C242 C243 C244 C246 C247 C248 C249 C251 C252 C253 C254 Input X0 U/D U/D U A X1 U/D D B X2 U/D R R R X3 U/D S S S X4 U/D U/D U A X5 U/D D B X6 R R R X7 S S S X10 U/D U A X11 D B X12 R R R X13 S S S X14 U/D U A X15 D B X16 R R R X17 S S S