Chapter 6 Applied Instructions Symbol S ： Source device D ： Device where the check result is stored n ： Bit whose state is checked 6_ Explanation 1. This instruction checks the state of the n th bit in S , and stores the result in D . 2. The operand n used in the 16-bit instruction must be between 0–15. For 32-bit instructions, n must be between 0–31. 3. Only the 32-bit instructions can use the 32-bit counter, but not the device E. Example 1. When X0.0 is ON, Y0.1 is ON if the value of the 15 th bit in D0 is one. When X0.0 is ON, Y0.1 is OFF if the value of the 15 th bit in D0 is 0. 2. When X0.0 switches to OFF, the state of Y0.1 remains the same as before X0.0 switches to OFF.
6-355 API Instruction code Operand Function 1207 D BON P S, D, n Checking the state of a bit Device X Y M S T C HC D FR SM SR E K 16# “$” F S D n BOOL WORD DWORD LWORD UINT INT DINT LINT REAL LREAL TMR CNT STRING Data type S D n Pulse instruction 16-bit instruction 32-bit instruction AS AS AS