At a Glance

Let us assume we want to send a character string Str_1 from station 1 of network 20 to the terminal port of station 5, then receive a character string Str_2 from the terminal port of station 5 of the same network.

Here, a video terminal is connected to the terminal port of station 5 of network 20.

The string to be sent contains 10 characters.

The function's management table is made up of the table of words %MW170:4.

Illustration

The two stations are connected via a Fipway network.

Programming

Programming in ST:

IF RE(%I0.3.8) AND NOT %MW170.0 THEN
   (* initialization of the data to send *)
   %MW173 := 10;
   (* communication function *)
        OUT_IN_CHAR(ADDR(’{20.5}0.0.0.SYS’),1,Str_1,%MW170:4,Str_2);
END_IF;

Request parameters:

Parameters

Description

ADDR(‘{20.5}0.0.0.SYS’)

  • {20.5}: network 20, station 5

  • 0: rack

  • 0: module

  • 0: channel 0

  • SYS: system address

1

Transmission then reception

Str_1

Variable of type STRING containing the message to send

%MW170:4

Management table

Str_2

Variable of type STRING that will contain the message received
NOTE: Before the function is launched, initialize the length parameter (in the example: %MW173 ) with the value corresponding to the number of characters (in bytes) to send to Str_1).

At the end of the exchange, %MW173 will contain the length of the data received (in bytes).