Yaskawa Ladder Works Programming Manual Instrukcja Użytkownika Pobierz pdf (Strona 179)

9.2 First-in First-out Function (FINFOUT)

9-4

9.2 First-in First-out Function (FINFOUT)

[Outline]

This is a first-in first-out type block data transfer function. The FIFO data table is composed of a 4-

word header part and a data buffer. 3 words of the header part (data size, input size, output size) must

be set before this function is referenced.

• When the data input command (In-Cmd) becomes ON, the designated number of data is

sequentially stored from the designated input data area to the data area of the FIFO table.

• When the data output command (Out-Cmd) becomes ON, the designated number of data are

transferred from the head of the data area of the FIFO table to the designated output data area.

• When the reset command (Reset) becomes ON, the number (amount) of data stored is set to zero

and the FIFO table empty output (Tbl-Emp) becomes ON.

•

If "size of available space for data (empty size) < input size" or if "data size < output size," the

FIFO table error (Tbl-Err) becomes ON.

[Format]

Symbol : FINFOUT

Full Name : First-in First-out

Category : SYSTEM

Icon :

[Parameter]

I/O

Definition

Parameter Name

I/O

Designation

Setting

In-Cmd B-VAL Data input command (IN-CMD)

Out-Cmd B-VAL Data output command (OUT-CMD)

Reset B-VAL Reset command

FIFO-Tbl Address input Head address of FIFO table

(MW or DW address)

In-Data Address input Head address of input data

(MW or DW address)

Input

Out-Data Address input Head address of output data

(MW or DW address)

FIFO Table

Configuration

0 : data size

1 : input size

2 : output size

3 : number of

data stored

4 : data

Tbl-Full B-VAL FIFO table is full.

Tbl-Emp B-VAL FIFO table is empty.

Output

Tbl-Err B-VAL FIFO table error.

1 2 ... 174 175 176 177 178 179 180 181 182 183 184 ... 219 220

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