ItpStartStop

Interface

VAR_INPUT
    bStart         : BOOL;
    bStop          : BOOL;
    nChnId         : UDINT;
    tTimeOut       : TIME;
END_VAR

VAR_OUTPUT
    bBusy          : BOOL;
    bErr           : BOOL;
    nErrId         : UDINT;
END_VAR 

Description

The ItpStartStop function block starts the NC channel whose ID is passed to the nChnId input when a positive edge is applied to the bStart input. On a positive edge at the bStop input, the NC channel is stopped. The bStop input has a higher priority than the bStart input, i.e. if both inputs have a positive edge, a channel stop is executed.
With a stop command, all tables in the NC are deleted and the axes are stopped in a controlled manner.

The bBusy output remains TRUE until the function block has executed a command, although only for as long as the time specified at the tTimeOut input. While bBusy = TRUE no new command is accepted at the inputs.
The output bErr is switched to TRUE if an error occurred during the execution of the command. The command-specific error code is contained in nErrId. The outputs are reset by carrying out a command at the inputs.

Requirements