FB_DBRead

VAR_INPUT

VAR_INPUT
    sNetID    : T_AmsNetId;
    hDBID     : DINT;
    sDBVarName: STRING(80);
    cbReadLen : UDINT;
    pDestAddr : POINTER TO BYTE;
    bExecute  : BOOL;
    tTimeout  : TIME;
END_VAR 

sNetID: String containing the AMS network ID of the target device, at which the ADS command is directed.

hDBID: Indicates the ID of the database to be used.

sDBVarName: Gives the name of the variable that is to be read.

cbReadLen: Indicates the length of the buffer that is to be read.

pDestAddr: Contains the address of the buffer which is to receive the data that has been read.

bExecute: The command is executed with a rising edge.

tTimeout: Indicates the time before the function is cancelled.

VAR_OUTPUT

VAR_OUTPUT
    bBusy    : BOOL;
    bError   : BOOL;
    nErrID   : UDINT;
    sSQLState: ST_DBSQLError;
END_VAR

bBusy: The command is in the process of being transmitted by ADS. No new command will be accepted as long as bBusy remains TRUE.

bError: Becomes TRUE, as soon as an error occurs.

nErrID: Returns the ADS error code or TcDatabaseSrv_Error_Codes if the bError output is set.

sSQLState: Returns the SQL error code of the corresponding database type

Requirements