SCIT_AlarmStop 1:

The "SCIT_AlarmStop" function block serves as an auxiliary block in order to carry out an Alarm_Stop on the Interbus card that is addressed by the NETID and the PORT. An Alarm_Stop places the card in the PAR_READY state and resets all the outputs.


    NETID    : T_AmsNetId;
    PORT     : T_AmsPort;
    WRTRD    : BOOL;

NETID: The network address of the computer in which the card is installed can be entered here (type: T_AmsNetID). If the card is located within the same system, it is also possible to give an empty string.

PORT: Contains the ADS port number of the card that was assigned by the TwinCAT system (type: T_AmsPort).

WRTRD: The function block is activated by a positive edge at this value.

TMOUT: Maximum time allowed for the execution of the command.


    BUSY       : BOOL;
    ERR        : BOOL;
    ERRID      : UDINT;
    RESULT     : WORD;

BUSY: After activation of the function block the busy signal remains asserted until an feedback is received.

ERR: If an error occurs while the command is being transferred, the ERR output is set once the BUSY signal is cancelled.

ERRID: Returns the ADS error number in the case of error.

RESULT: Returns the result from the card (provided that fault-free ADS transport has occurred (ERR = FALSE)). RESULT = 0 identifies successful execution of the command. A value other than 0 contains the error number from the Phoenix card.

ADDERRINFO: If feedback from the card is negative, this contains additional error information (cf. the Phoenix card error descriptions).


Development environment

Target platform

IO Hardware

PLC libraries to be integrated (category group)

TwinCAT v3.1.0

None. This functionality is not supported by TwinCAT 3 at present!


Tc2_IoFunctions (IO)