6.14 Data Table Operation instructions

Version 1.2 by Iris on 2025/10/21 11:41

SFRD/Shift Read

SFRD(P)

Data read instructions for first-in, first-out and control.

-[SFRD (s) (d) (n)]

Content, range and data type

Parameter	Content	Range	Data type	Data type (label)
(s)	The start word device number storing data (The start is a pointer, and the data starts from (s)+1)	-	Signed BIN 16 bit	ANY16
(d)	The word device number storing the first-out data	-	Signed BIN 16 bit	ANY16
(n)	It should be specified as the value of the number of points + 1 of the stored data. +1 is pointer	2 to 512	Signed BIN 16 bit	ANY16

Device used

instruction

Parameter

Devices

Index modification

Pulse

extension

T(bit)

C(bit)

LC(bit)

HSC(bit)

D.b

KnX

KnY

KnM

KnS

HSC

[D]

XXP

SFRD

Parameter 1

●

Parameter 2

●

Parameter 3

●

Features

Transfer (s)+1 written sequentially to (d) by SFWR instruction, shift up each point (n)-1 by one word from (s)+1. The number of stored data of (s) subtracts one.

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).

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps2.jpg$

Related device

Devices	Name	Content
SM153	Zero bit	Data readout usually starts from (s)+1, but when the pointer (s) is 0, the zero bit SM153 will operate.

✎Note:

The data after reading would not change the content of (s)+(n) due to reading.

In the case of continuous execution (SFRD) instructions, each scan time (operation cycle) will be read sequentially, but the content of (s) + (n) would not change. When the pointer (s) is 0, it would become no processing, and the content of (d) would not change.

Error code

Error code	Content
4084H	When the value set in (n) is other than the following. 2≤(n)≤512
4084H	A negative value is specified in (s).
4085H	When the device specified in the read application instruction (s) and (n) exceeds the corresponding device range.
4086H	When the device specified in the write application instruction (s) and (d) exceeds the corresponding device range.

Example

The following examples illustrate the use of shift write (SFWR) and shift read (SFRD) instructions.

(1) Action content

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.
The product number is a hexadecimal number with 4 digits or less, and the maximum inventory is below 99 points.

(2) Program

Program 1

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps3.png$ $file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps4.png$ $file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps5.png$ $file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps6.png$ $file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps7.jpg$

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps8.jpg$

Program 2

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps9.jpg$ First-in-first-out data read instruction

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps10.jpg$

Turn X0 from OFF to ON, and this instruction acts according to the following numbers 1 to 3. (The content of D10 remains unchanged),

The content of D2 is read out and sent to D20.
D10 to D3 all shift one register to the right.
The contents of pointer D1 are reduced by 1.

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps11.png$ 6.14.2 POP/Read From the Back of the Data Table

POP(P)

Read the last data written by the shift write instruction (SFWR) for first in first out/first in last out control.

-[POP (s) (d) (n)]

Content, range and data type

Parameter	Content	Range	Data type	Data type (label)
(s)	The start device number that stores the first-in data (including pointer data) (the start word device number that stores data)	-	Signed BIN 16 bit	ANY16
(d)	The device number that stores the last-out data	-	Signed BIN 16 bit	ANY16
(n)	The points of stored data	2 to 512	Signed BIN 16 bit	ANY16

Device used

instruction

parameter

Devices

Index modification

Pulse

extension

T(bit)

C(bit)

LC(bit)

HSC(bit)

D.b

KnX

KnY

KnM

KnS

HSC

[D]

XXP

POP

Parameter 1

●

Parameter 2

●

Parameter 3

●

Features

For the word device of "(s) to (s)+(n)-1", the device of "(s) + instruction data (s)" will be read to (d) ( The last data written by the shift write instruction (SFWR) for first-in first-out control is read to (d)). (N) Specifies 2 to 512.

The value of pointer data (s) is reduced by one.

First-in-last-out control data

	Content
(S)	Pointer data (the number of stored data)
(S)+1	Data field (Data entered by shift write instruction (SFWR))
(S) +2
(S) +3
......
(S)+(n)-3
(S)+(n)-2
(S)+(n)-1

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps12.jpg$

✎Note:

✎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".

✎When the current value of pointer (s) is 0, the zero flag SM153 turns on, and the POP(P) instruction becomes no processing.

✎When the current value of pointer (s) is 1, write 0 to (s), and the zero flag SM153 turns on.

Error code

Error code	Content
4084H	(s)>(n)-1
	(s)<0
	Data outside the specified range is entered in (n). 2≤(n)≤512
4085H	When the device specified in the read application instruction (s) and (n) exceeds the corresponding device range
4086H	When the device specified in the write application instruction (s) and (d) exceeds the corresponding device range

Example

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps13.jpg$

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.

When the data entered first is the content in the table below.

Pointer	D100	K3
Data	D101	H1234
	D102	H5678
	D103	HABCD
	D104	H0000
	D105	H0000
	D106	H0000

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps14.png$

6.14.3 SFWR/Shift Write

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps15.png$ SFWR(P)

Data writing instructions for first-in-first-out and control.

-[SFWR (s) ( d) (n)]

Content, range and data type

Parameter	Content	Range	Data type	Data type (label)
(s)	The word device number that stores the data you want to enter first	-	Signed BIN 16 bit	ANY16
(d)	The start word device number for storing data and shifting (the start is pointer, and data starts from (d)+1)	-	Signed BIN 16 bit	ANY16
(n)	The value of points + 1 of stored data should be specified	2 to 512	Signed BIN 16 bit	ANY16

Device used

instruction

Parameter

Devices

Index modification

Pulse

extension

T(bit)

C(bit)

LC(bit)

HSC(bit)

D.b

KnX

KnY

KnM

KnS

HSC

[D]

XXP

SFWR

Parameter 1

●

Parameter 2

●

Parameter 3

●

Features

Start from (d)+1, write the contents of (s) to point (n)-1, and the stored data of (d) add one. For example, if (d)=0, write to (d) +1, (d)=1, write to (d)+2.

Through the first execution, the content of (s) is stored to (d)+1 and becomes the value of (s).

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).

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps16.jpg$

Related device

Devices	Name	Content
SM151	carry	When the content of pointer (s) exceeds (n)-1, it becomes no processing (no writing), and the carry flag SM151 turns ON.

✎Note:

In the continuous execution type (SFWR) instruction, you should be noted that each scan time (operation cycle) will be stored (overwritten) sequentially.

Error code

Error code	Content
4084H	When the value set in (n) is other than the following. 2≤(n)≤512
4084H	A negative value is specified in (d).
4085H	When the device specified in the read application instruction (s), (d) and (n) exceeds the corresponding device range.
4086H	When the device specified in the write application instruction (d) exceeds the corresponding device range.

Example

The following examples illustrate the use of shift write (SFWR) and shift read (SFRD) instructions.

7.14.4 (1) Action content

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.
The product number is a hexadecimal number with 4 digits or less, and the maximum inventory is below 99 points.

(2) Program

Program 1

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps17.png$ $file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps18.png$ $file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps19.png$ $file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps20.png$ $file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps21.jpg$

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps22.jpg$

Program 2

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps23.jpg$ First-in-first-out data read instruction

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps24.jpg$

When X0=1, the content of D0 is stored in D2, and the content of D1 becomes 1. When X0 changes from OFF to ON again, the content of D0 is stored in D3, the content of D1 becomes 2, and so on. If the content of D1 exceeds n-1, the instruction is not processed, and the carry flag M8022 will be set to 1.

6.14.4 FINS/Data Table Data Insertion

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps25.png$ FINS(P)

Insert the BIN 16-bit data specified in (s) into the number (n) of the data table specified in (d). After the instruction is executed, the data starting with number (n) in the data table will be postponed downward one by one.

-[FINS (s) (d) (n)]

Content, range and data type

Parameter	Content	Range	Data type	Data type (label)
(s)	The start number of device storing the inserted data	-	Signed BIN 16 bit	ANY16
(d)	The starting number of table	-	word	ANY16
(n)	The position of the inserted table	1-512	Signed BIN 16 bit	ANY16

Device used

instruction

Parameter

Devices

Index modification

Pulse

extension

T(bit)

C(bit)

LC(bit)

HSC(bit)

D.b

KnX

KnY

KnM

KnS

HSC

[D]

XXP

FINS

Parameter 1

●

Parameter 2

●

Parameter 3

●

Features

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps26.jpg$

N: the number of data storage;
DTr: data table range;
When (n)=2, it will be inserted into (d)+2.

✎Note:

✎The range of device used in the data table is managed by user.

✎The range of the data table is (d) started from device (d) +1) after the number of data (d).

Error code

Error code	Content
4084H	FINS(P) instruction is executed when the value of (d) is 0.
	The storage data of the table of (d) exceeds 512.
	When the data set in (n) is other than the following, 1≤(n)≤512.
	When the FINS(P) instruction is executed, the table position (n) of the inserted data is greater than data storage number.
4085H	When the device specified in the read application instruction (s), (d) and (n) exceeds the corresponding device range.
4086H	When the device specified in the write application instruction (d) exceeds the corresponding device range.

Example

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps27.jpg$

When X10=ON, insert the data of D100 into No. 3 of the data table of D0 to D4.

However, when the number of saved data exceeds 7, the FINS(P) instruction is not executed (the device range used in the data table is D0 to D7).

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps28.png$

6.14.5 FDEL/Data Deletion of Data Sheet

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps29.png$ FDEL(P)

Delete the (n)th data of the data table specified in (d) and store it in the device specified in (s). After the instruction is executed, the data after (n)+1 in the data table will be postponed forward one by one.

-[FDEL (s) (d) (n)]

Content, range and data type

Parameter	Content	Range	Data type	Data type (label)
(s)	The start number of the device stored deleted data	-	Signed BIN 16 bit	ANY16
(d)	The starting number of the table	-	word	ANY16
(n)	The position of the deleted table	1-512	Signed BIN 16 bit	ANY16

Device used

instruction

Parameter

Devices

Index modification

Pulse

extension

T(bit)

C(bit)

LC(bit)

HSC(bit)

D.b

KnX

KnY

KnM

KnS

HSC

[D]

XXP

FDEL

Parameter 1

●

Parameter 2

●

Parameter 3

●

Features

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps30.jpg$

✎Note:

✎The user is responsible for the management of the device range used in the data sheet.

✎The range of the data table is (d) after the data storage number (d) of the device ((d) + 1).

Error code

Code	Content
4084H	FDEL(P) instruction is executed when the value of (d) is 0.
	The storage data of the table of (d) exceeds 512.
	When the data set in (n) is other than the following, 1≤(n)≤512.
	When the FDEL(P) instruction is executed, the table position (n) of the deleted data is greater than data storage number.
4085H	When the device specified in the read application instruction (d) and (n) exceeds the corresponding device range.
4086H	When the device specified in the write application instruction (s) and (d) exceeds the corresponding device range.

Example

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps31.jpg$

When X10 is ON, delete the second data in the data table of D100 to D105, and save the deleted data in D0. However, when the number of data saved is 0, do not execute the FDEL instruction. (The device range used in the data table is D100 to D107.)

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps32.png$

6.14 Data Table Operation instructions

SFRD/Shift Read

$file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml7696\wps11.png$ 6.14.2 POP/Read From the Back of the Data Table

6.14.3 SFWR/Shift Write

6.14.4 FINS/Data Table Data Insertion

6.14.5 FDEL/Data Deletion of Data Sheet

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