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. 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.

START: The function 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 and acknowledgement is received.

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