PLC_ReadSymInfo

VAR_INPUT

VAR_INPUT
    NETID  : T_AmsNetId;
    PORT   : T_AmsPort;
    START  : BOOL;
    TMOUT  : TIME := DEFAULT_ADS_TIMEOUT;
END_VAR

NETID: It is possible here to provide the AmsNetId of the TwinCAT computer whose symbol information is to be found (type: T_AmsNetID). If it is to be run on the local computer, an empty string can be entered.

PORT: The port number of a PLC run-time system (type: T_AmsPort).

START: the block is activated by a positive edge at this input.

TMOUT: States the length of the timeout that may not be exceeded by execution of the ADS command.

VAR_OUTPUT

VAR_OUTPUT
    BUSY     : BOOL;
    ERR      : BOOL;
    ERRID    : UDINT;
    SYMCOUNT : UDINT;
    SYMSIZE  : UDINT;
END_VAR

BUSY: When the function block is activated this output is set. It remains set until a feedback is received.

ERR: If an error should occur during the transfer of the command, then this output is set once the BUSY output was reset.

ERRID: Supplies the ADS error number when the ERR output is set.

SYMCOUNT: The number of symbols in the PLC run-time system.

SYMSIZE: Length of the data, in bytes, in which the symbol information is stored.

Requirements