AH500 Programming Manual Symbol: S ： Initial device Word D ： Device in which the data is stored Word 1. The device specified by S is taken as a pointer. When the instruction is executed, the data in the device specified by the value of the pointer is written into the device specified by D and cleared to 0, and the value in the device specified by S decreases by one. When the value in the device specified by S is equal to 0, the instruction does not process the reading of the data, and the zero flag SM600 is ON. 2. Generally, the pulse instruction SFPOP is used. Explanation: Example: When X0.0 is ON, the data in the device specified by the value in D0 is written into D10.
After the data is shifted, the data in the device specified by the value in D0 is cleared to 0, and the value in D0 increases by one. D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 S D Pointer The data is read. D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 1000 Pointer Additional remark: 1. If the value in S is less than 0, the instruction is not executed, SM0 is ON, and the error code in SR0 is 16#2003. 2. If S +(The value in S ) exceeds the device range, the instruction is not executed, SM0 is ON, and the error code in SR0 is 16#2003.
6-248 API Instruction code Operand Function 1106 SFPO P S, D Reading the latest data from the data list Device X Y M S T C HC D L SM SR E PR K 16# “$” DF S D Pulse instruction 16-bit instruction (5 steps) 32-bit instruction AH500 AH500 - 1000 7 0 6