FB_DBConnectionOpen

FB_DBConnectionOpen 1:

You can open connections to databases with this function block FB_DBConnectionOpen. This can improve the read and write access speed with the fuction blocks FB_DBWrite, FB_DBRead, FB_DBRecordInsert and FB_FBRecordSelect.

VAR_INPUT

VAR_INPUT
    sNetID      : T_AmsNetId;
    hDBID       : DINT;
    bExecute    : BOOL;
    tTimeout    : TIME;
END_VAR

sNetID : Is a string containing the AMS network identifier of the target device to which the ADS command is directed.

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

bExecute : The command is executed with the rising edge.

tTimeout : States 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 : Supplies the ADS Error Code or the TcDatabaseSrv_Error_Codes when the bError output is set.

sSQLState : Supplies the SQL error code of the specified database type.

Requirements

Development environment	Target system type	PLC libraries to be linked
TwinCAT v2.10.0	PC oder CX (x86)	TcDatabase.Lib
TwinCAT v2.10.0	CX (ARM)	TcDatabase.Lib