Some functional commands commonly used by Mitsubishi PLC - News - Global IC Trade Starts Here.

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(D) CMP (P) Comparison: This instruction performs an algebraic comparison between the data of two source operating elements and sends the result to the target element to determine its state. Source Operating Elements: K, H, KnX, KnY, KnM, KnS, TCDV/Z Target Component: YMS Format: LD X0 CMP(P) K100 C20 M0 When X0 transitions from OFF to ON: - If K100 > C20 current value, M0 = 1 - If K100 = C20 current value, M1 = 1 - If K100 < C20 current value, M2 = 1 The CMP instruction runs once per scan cycle when the condition is met. (D) ZMP (P) Interval Comparison: Compares a single data value with the interval of two source components and sends the result to the target component to determine its state. Source Operating Elements: K, H, KnX, KnY, KnM, KnS, TCDV/Z Target Component: YMS Format: LD X0 ZCP(P) K100 K120 C30 M3 When X0 transitions from OFF to ON: - If K100 > C30 current value, M3 = 1 - If K100 ≤ C30 ≤ K120, M4 = 1 - If K120 < C30 current value, M5 = 1 The ZCP instruction executes once per scan cycle when the condition is satisfied. (D) MOV (P) Transfer: Transfers the data from the source operating element to the target component. Source Operating Elements: K, H, KnX, KnY, KnM, KnS, TCDV/Z Target Components: KnY, KnM, KnS, TCDV/Z Format: LD X0 MOV(P) K100 D10 When X0 transitions from OFF to ON, the value 100 is transferred to D10. In continuous mode, the instruction runs once per scan cycle when the condition is met. For 32-bit data transfer using DMOV, component pairs are used. The first digit of the pair can be even or odd, but it's recommended to use even numbers to avoid errors. When the transfer instruction is executed, constants are automatically converted into binary and stored in the target component. (D) SMOV (P) Shift Transfer: Converts the source component’s data into BCD code and shifts it to the target component as specified. Source Operating Elements: K, H, KnX, KnY, KnM, KnS, TCDV/Z Target Components: KnY, KnM, KnS, TCDV/Z Range for m: K/H is 1–4, meaning D1 cannot exceed 9999. n: KH Example: D1 = 1685, D2 = 0 LD X0 SMOV(P) D1 K4 K2 D2 K3 When X0 transitions from OFF to ON: - D1 = 1685 becomes BCD: 0001 0110 1000 0101 - D2 = 0 becomes BCD: 0000 0000 0000 0000 Then, the rightmost 2 bits of the BCD code from D1 (starting at the 4th bit from the right) are moved to the 2nd position from the right in D2. The 1st and 4th bits remain unchanged. Now D2 = 0000 0001 0110 000, which equals 160. The SMOV instruction runs once per scan cycle when the condition is met. (D) CML (P) Negated Transmission: Converts the data in the source component into binary, inverts each bit (0→1, 1→0), and transfers it to the target component. Source Operating Elements: K, H, KnX, KnY, KnM, KnS, TCDV/Z Target Components: KnY, KnM, KnS, TCDV/Z Example: D0 = 11 LD X0 CML(P) D0 K1Y0 When X0 transitions from OFF to ON: - D0 = 11 becomes binary: 1010 - Inverted: 0101 - Output to K1Y0: Y0=0, Y1=1, Y2=0, Y3=1 The CML instruction runs once per scan cycle when the condition is met. Share this content with your friends and learn more about industrial automation and electronics!