2 Functions of Devices in DVP-PLC i) The number of sections being executed is determined upon the total number of sections. (Max. number of sections = 10) j) Acceleration or deceleration is determined upon the start frequency of the next section. That is, if the target frequency of the current section next section and the target frequency of the next section must > its start frequency. If the target frequency of the current section > the start frequency of the next section, deceleration will take place in the next section and the target frequency of the next section must guaranteed if the user does not follow the rules. k) When PLC goes from STOP to RUN, M1144 ~ M1149 will be reset to “Off”.
When PLC goes from RUN to l) SA/SX/SC uses parameter table D0 ~ D999 and D2000 ~ D4999. If the used parameter table (including all STOP, only M1144 will be reset, not M1145 ~ M1149. the used section parameters) falls off the range, the instruction will not be executed and M1144 will be “Off”. 5. Example 1: Calculate the number of output pulses in every acceleration/deceleration section Assume you set the start frequency of a section as 200Hz, gap time as 100ms, gap frequency as 100Hz, target frequency as 500Hz, and target number of pulses as 1,000:
The number of output pulses at start frequency = 200 Ч 100 / 1,000 = 20 The number of output pulses in the first acceleration gap = 300 Ч 100 / 1,000 = 30 The number of output pulses in the second acceleration gap = 400 Ч 100 / 1,000 = 40 The number of output pulses at target frequency = 1,000 – (40 + 30 + 20) = 910 (Please be noted that we suggest this number be bigger than 10.) Output time for target frequency = 1 / 500 Ч 910 = 1,820 ms Total time spent for this section = 1,820 + 3 Ч 100 = 2,120 ms DVP-PLC Application Manual 2-106