Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 292)

7 Application Instructions API 50-99
D V P - P L C A P P L I C AT I O N M A N U A L 7-8
4. High speed counters supported by SC series MPU (total bandwidth: 130KHz):
1-phase 1 input 1-phase 2 inputs 2-phase inputs
Type
Input
C235 C236 C237 C238 C239 C240 C241 C242 C243 C244 C245 C246 C247 C249 C250 C251 C252 C254 C255
X0 U/D U/D U/D U U U A A A
X1 U/D R R D D D B B B
X2 U/D U/D R R R R
X3 U/D R S S S
X4 U/D
X5 U/D
X10 U/D U A
X11 U/D D B
U: Progressively increasing input A: A phase input S: Input started
D: Progressively decreasing input B: B phase input R: Input cleared
a) The functions of the high speed counters of input points X0 ~ X5 are the same of those in SA/SX series
MPU.
b) The input points of 1-phase input X10 (C243), X11 (C245) and (X10, X11) C250 can reach a frequency of
100KHz. The total bandwidth of X10 ~ X11 is 130KHz. C255 of the 2-phase input (X10, X11) can reach a
frequency of 50KHz.
c) For SA/SX/SC series MPU, the uses of DHSCS instruction with DHSCR instruction cannot be more than 6
times and the uses of DHSZ instruction cannot be more than 6 times as well. When DHSCR instruction
designates I interruption, the designated high speed counter cannot be used in other DHSCS, DHSCR
and DHSZ instructions.
d) The functions of X10 ~ X11 high speed counters in SC series MPU:
i) When X10 and X11 are set as 1-phase 1 input or 1-phase 2 inputs. The maximum frequency of a
single phase can reach 100KHz. When they are set as 2-phase 2 inputs, the maximum frequency can
reach 50KHz.
ii) X10 and X11 can select rising-edge counting mode or falling-edge counting mode. X10 is set by
D1166 and X11 is set by D1167. K0: rising-edge counting. K1: falling-edge counting. K2: rising/falling
edge counting (only supports X10).
iii) The counting up and down of C243 are determined by the On/Off of M1243. The counting up and
down of C245 are determined by the On/Off of M1245. Rising-edge and falling-edge counting are not
able to take place at the same time. The rising-edge trigger and falling-edge trigger of C250 are
determined by the content (K0 or K1) of D1166. C255 can only be used in a 4 times frequency
counting and you can only select rising-edge trigger.
iv) When C243 or C245 is in use, you will not be able to use C250 or C255, and vice versa.
v) High speed counter and high speed comparator: