Lenze Global Drive PLC Developer Studio Uživatelský manuál stáhnout pdf (Strana 26)

LenzeFpiDrv.lib function library

Functions

3.6 Receive status (L_Rs232GetReceiveState)

3−11

LenzeFpiDrv.lib EN 1.1

Example

Calling up the function in ST:

(* read receive state *)

ReturnValue := L_Rs232GetReceiveState (30, FALSE);

(* Receive Error? *)

IF (ReturnValue < 0) THEN

(* Receive Error *)

(* get error code and number *)

(* of received bytes in case of error *)

g_nReceiveErrorCode := ReturnValue;

g_wNumberOfReceivedBytes_Error := L_Rs232GetReceiveState (30, TRUE);

ELSE

(* No Receive Error *)

(* get number of received bytes *)

g_wNumberOfReceivedBytes_NoError := ReturnValue;

END_IF

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Lenze Global Drive PLC Developer Studio Uživatelský manuál Strana 26