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The library SysLibComEx.lib

The SysLibComEx library is an extension for the handling of serial interfaces.

All serial interfaces can in principle be operated via the SysLibCom.lib. A special port must be specified

when opening the interface of a serial interface module.

The library SysLibComEx contains prepared global constants for the addressing of the ports and makes a

function for the switching between RS-422 and RS-485 available.

Global constants for the port addressing

(* COM port numbers *)

COM_PORT_ONBOARD : UINT := 1;

COM_PORT_SLOT : UINT := 2;

(* COM port numbers for extension modules (add 3 parts) *)

(* 1) module type *)

COM_PORT_EXT_RS232 : UINT := 21000;

COM_PORT_EXT_CURRENTLOOP : UINT := 22000;

COM_PORT_EXT_RS4XX : UINT := 23000;

(* 2) module address *)

COM_PORT_EXT_ADDR0 : UINT := 0;

COM_PORT_EXT_ADDR1 : UINT := 10;

COM_PORT_EXT_ADDR2 : UINT := 20;

COM_PORT_EXT_ADDR3 : UINT := 30;

(* 3) interface *)

COM_PORT_EXT_UPPER : UINT := 0;

COM_PORT_EXT_LOWER : UINT := 1;

Examples:

The port number for the serial interface on the CPU Baugruppe is determined as follows:

PortNo = COM_PORT_ONBOARD;

The port number for the upp

er port of a serial RS-232-C interface module with address 0 is calculated as

follows:

PortNo = COM_PORT_EXT_ADDR0+COM_PORT_EXT_UPPER+COM_PORT_EXT_RS232;

CECX-VIII 1

Festo CECX-X-C1 Series User Manual

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