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Example - Ladder Diagram

BKCMP>​


The BKCMP> instruction compares n number of WORD data registers starting at S1 to n number of WORD data registers starting at S2.
For each data register in the range S1 ~ Sn that is greater than each data register in the range S2 ~ Sn, each data register in the range D ~ Dn will turn bit 0 to ON (1).

Ladder Diagram Example​



  • The BKCMP> instruction will compare the following expressions for a true or false value:
    • D0 > D5 → 32,000 > 30,000
    • D1 > D6 → -7,800 > 6,300
    • D2 > D7 → 10,000 > 9,800
    • D3 > D8 → 4,500 > -5,600


  • When the open contact, M0.2, is powered ON (1), the values of the data registers are compared.
    • D0 > D5 → 32,000 > 30,000 (TRUE → D10 = 1)
    • D1 > D6 → -7,800 > 6,300 (FALSE → D11 = 0)
    • D2 > D7 → 10,000 > 9,800 (TRUE → D12 = 1)
    • D3 > D8 → 4,500 > -5,600 (TRUE → D13 = 1)

Memory Monitor​

BKCMP>P​


The BKCMP>P one-shot instruction compares n number of WORD data registers starting at S1 to n number of WORD data registers starting at S2.
For each data register in the range S1 ~ Sn that is greater than each data register in the range S2 ~ Sn, each data register in the range D ~ Dn will turn bit 0 to ON (1).
Every time this instruction executes, it energizes the output only once.

Ladder Diagram Example​



  • The BKCMP>P instruction will compare the following expressions for a true or false value:
    • D15 > D19 → -5,000 > -10,000
    • D16 > D20 → 32,154 > 32,000
    • D17 > D21 → 2,000 > 2,000


  • When the open contact, M0.3, is powered ON (1), the values of the data registers are compared.
    • D15 > D19 → -5,000 > -10,000 (TRUE → D23 = 1)
    • D16 > D20 → 32,154 > 32,000 (TRUE → D24 = 1)
    • D17 > D21 → 2,000 > 2,000 (FALSE → D25 = 0)

Memory Monitor​