Chapter 6 Applied Instructions Symbol: S ： Initial device Word D ： Device in which the data is stored Word n ： Device in which the data is deleted Word Explanation: 1. The value in the device specified by S indicates the length of the data, and the data is in the devices specified by S +1~ S +(The value in S ). When the instruction is executed, the data in the device specified by S + n is stored in D and deleted, the data in the devices specified by S + n + 1 ~ S +(The value in S ) is shifted to the right, the data in the device specified by S +(The value in S ) is 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 deleting of the data, and the zero flag SM600 is ON. 2. Generally, the pulse instruction SFDELP is used. 3. The operand n should be within the range between 1 and 32767. Example: Suppose the value in D0 is 9, and n is 4. When X0.0 is ON, the data in D4 is stored in D20. After the data in D4 is deleted, the data in D5~D9 is shifted to the right, and the value in D0 decreases by one. D20 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 S D n=4 The length of the data The data is deleted.
D20 D8 D7 D6 D5 D4 D3 D2 D1 D0 22 D9 The length of the data 6-249 API Instruction code Operand Function 1107 SFDEL P S, D, n Deleting the data from the data list Device X Y M S T C HC D L SM SR E PR K 16# “$” DF S D n Pulse instruction 16-bit instruction (7 steps) 32-bit instruction AH500 AH500 - Pulse instruction 16-bit instruction (7 steps) 32-bit instruction AH500 AH500 - 4712 857 123 100 111 22 48 5 799 9 0 4712 857 123 100 111 48 5 799 8