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Last modified by Iris on 2025/10/21 14:06
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Title
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1 -6.14 Data Table Operation instructions
1 +6.14
Content
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1 -=== **SFRD/Shift Read** ===
1 +=== **6.14.1 SFRD/Shift Read** ===
2 2  
3 -**SFRD(P)**
3 +[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps1.png]]**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 -(% style="text-align:center" %)
39 -[[image:1761018188037-771.png]]
38 +[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps2.jpg]]
40 40  
41 -
42 42  **Related device **
43 43  
44 44  |**Devices**|**Name**|**Content**
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64 64  
65 65  (1) Action content
66 66  
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.
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.
68 68  
69 - 2) The product number is a hexadecimal number with 4 digits or less, and the maximum inventory is below 99 points.
70 -
71 71  (2) Program
72 72  
73 - 1) Program 1
70 +1. Program 1
74 74  
75 -(% style="text-align:center" %)
76 -[[image:1761018361678-654.png]]
72 +[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps3.png]][[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps4.png]][[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps5.png]][[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps6.png]] [[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps7.jpg]]
77 77  
78 -(% style="text-align:center" %)
79 -[[image:1761018410107-778.png||height="328" width="445"]]
74 +[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps8.jpg]]
80 80  
81 - 2) Program 2
76 +1. Program 2
82 82  
83 -(% style="text-align:center" %)
84 -[[image:1761018480645-416.png]]
78 +[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps9.jpg]] First-in-first-out data read instruction
85 85  
80 +[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps10.jpg]]
86 86  
87 87  Turn X0 from OFF to ON, and this instruction acts according to the following numbers 1 to 3. (The content of D10 remains unchanged),
88 88  
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90 90  * D10 to D3 all shift one register to the right.
91 91  * The contents of pointer D1 are reduced by 1.
92 92  
93 -=== **POP/Read From the Back of the Data Table** ===
94 94  
89 +
90 +=== [[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps11.png]]**6.14.2 POP/Read From the Back of the Data Table** ===
91 +
95 95  **POP(P)**
96 96  
97 -Read the last data written by the shift write instruction (SFWR) for first in first out/first in last out control. 
94 +Read the last data written by the shift write instruction (SFWR) for first in first out/first in last out control.
98 98  
99 99  -[POP  (s)  (d)  (n)]
100 100  
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139 139  |(S)+(n)-2
140 140  |(S)+(n)-1
141 141  
139 +[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps12.jpg]]
142 142  
143 -
144 -(% style="text-align:center" %)
145 -[[image:1761018592821-392.png]]
146 -
147 147  **✎Note: **
148 148  
149 149  **✎**If the POP(P) instruction is programmed in continuous execution type, the instruction will be processed per cycle. Therefore, it may not be possible to achieve the desired action. Generally, POP(P) instruction programming should be executed with "pulse execution type" or "pulse specified contact".
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163 163  
164 164  **Example**
165 165  
166 -(% style="text-align:center" %)
167 -[[image:1761018612253-455.png]]
160 +[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps13.jpg]]
168 168  
169 169  Each time M1 is ON, for the values of D20 input first in D101 to D106, the last saved value would be saved in D10, and then the data saved number (pointer D100) will be reduced by 1.
170 170  
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178 178  |D105|H0000
179 179  |D106|H0000
180 180  
174 +[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps14.png]]
181 181  
182 182  
183 -(% style="text-align:center" %)
184 -[[image:1761018751619-514.png]]
177 +=== **6.14.3 SFWR/Shift Write** ===
185 185  
186 -=== **SFWR/Shift Write** ===
179 +[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps15.png]]**SFWR(P)**
187 187  
188 -**SFWR(P)**
189 -
190 190  Data writing instructions for first-in-first-out and control.
191 191  
192 192  -[SFWR (s)  ( d) (n)]
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218 218  
219 219  If the content of (s) is changed and executed for the second time, the content of (s) is stored to (d)+2, and the content of (d)+2 becomes (s) (in the continuous execution instruction SFWR, each operation cycle will be stored sequentially, so the pulse execution instruction SFWRP should be used for programming). After that, the data will be filled in sequentially from the right, and the number of data storage points is displayed by the content of the pointer (d).
220 220  
221 -[[image:1761018913263-720.png]]
212 +[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps16.jpg]]
222 222  
223 -
224 224  **Related device**
225 225  
226 226  |**Devices**|**Name**|**Content**
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317 317  |4085H|When the device specified in the read application instruction (s), (d) and (n) exceeds the corresponding device range.
318 318  |4086H|When the device specified in the write application instruction (d) exceeds the corresponding device range.
319 319  
310 +
320 320  **Example**
321 321  
322 322  [[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps27.jpg]]
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