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Last modified by Iris on 2025/10/21 14:06
From version 1.1
edited by Iris
on 2025/10/21 11:38
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To version 1.3
edited by Iris
on 2025/10/21 11:44
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1 -6.14
1 +6.14 Data Table Operation instructions
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1 -=== **6.14.1 SFRD/Shift Read** ===
1 +=== **SFRD/Shift Read** ===
2 2  
3 -[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps1.png]]**SFRD(P)**
3 +**SFRD(P)**
4 4  
5 5  Data read instructions for first-in, first-out and control.
6 6  
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35 35  
36 36  The content of (s)+1 is transferred (read) to (d). At the same time, the content of the pointer (s) decreases, and the data is shifted up by 1 word each. (In the continuous execution instruction SFRD, each operation cycle will shift, so the pulse execution instruction SFRDP should be used for programming).
37 37  
38 -[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps2.jpg]]
38 +(% style="text-align:center" %)
39 +[[image:1761018188037-771.png]]
39 39  
41 +
40 40  **Related device **
41 41  
42 42  |**Devices**|**Name**|**Content**
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62 62  
63 63  (1) Action content
64 64  
65 -1. While registering the product number, in order to realize the first-in-first-out principle, the following introduces an example of a ladder ladder diagram that outputs the current product number.
66 -1. The product number is a hexadecimal number with 4 digits or less, and the maximum inventory is below 99 points.
67 +1) While registering the product number, in order to realize the first-in-first-out principle, the following introduces an example of a ladder ladder diagram that outputs the current product number.
67 67  
69 +2) The product number is a hexadecimal number with 4 digits or less, and the maximum inventory is below 99 points.
70 +
68 68  (2) Program
69 69  
70 70  1. Program 1
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91 91  
92 92  **POP(P)**
93 93  
94 -Read the last data written by the shift write instruction (SFWR) for first in first out/first in last out control.
97 +Read the last data written by the shift write instruction (SFWR) for first in first out/first in last out control. 
95 95  
96 96  -[POP  (s)  (d)  (n)]
97 97  
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307 307  |4085H|When the device specified in the read application instruction (s), (d) and (n) exceeds the corresponding device range.
308 308  |4086H|When the device specified in the write application instruction (d) exceeds the corresponding device range.
309 309  
310 -
311 311  **Example**
312 312  
313 313  [[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps27.jpg]]
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