Ladder diagram of fuzzy control scale function

) PLC implementation of fuzzy control algorithm This system uses OMRON's CQMI PLC as the controller. In the implementation of fuzzy control
algorithm, fuzzy control table query is the key to program design. Figure 26-34 shows
the ladder diagram for realizing the fuzzy control table lookup function in this example.
  The description is as follows:
  In order to simplify the program design, the elements of the input fuzzy domain in the program design are [-6, -5, -4, -3, -2, -1, 0, +1,
  +2, +3, + 4, +5, +6] is transformed into [0, 1, 2, 3, 4, 5, 6, 7,
  8.9. 10, 11, i2], and the control
  result as above They are stored in DM 0100 to
  DM0268 in order from bottom to left and from left to right. The base address of the control variable is 100, and the offset address is &×13+B.
    DMi∞02 and DM0003 are respectively E and E in the module universe.
  the corresponding element in . "M call, DM003l DM 1000" is an indirect addressing instruction,
  which takes the content of function 031 as the address of the unit being transferred, and
  transfers the content of the unit designated by this address (i.e., the control quantity U) to the intermediate unit
  DM 1000. Then " is obtained through defuzzification operation, and then
  passed to control the opening of the aeration valve.
    (4) Conclusion This example combines fuzzy control technology with PIC to realize
  fuzzy control of CoD System. The use of PLC to implement fuzzy control systems
  not only retains the characteristics of the PLC fuzzy control
  system such as reliability, flexibility, and strong practical capabilities , but also improves the intelligence of the error control system. Applications show that this
  control method not only improves the efficiency of sewage The reliability of the treatment system saves energy
and provides an ideal control scheme for further realizing real-time control of various activated sludge processes.