WAIT.START monitor command WAIT.START monitor command Syntax WAIT.START condition Function Put a monitor command program into a wait state until a condition is TRUE. Usage Considerations This command is not intended to be entered at the system keyboard. It is normally used as a step in a monitor command program. You can cancel an activated WAIT.START command by pressing CTRL+C on the keyboard, by pressing the EMERGENCY STOP button on the external Front Panel, or by pressing the EMERGENCY STOP button on the pendant. Aborting an activated WAIT.START command causes termination of the command program containing the command.
Parameter condition Optional real value, variable, or expression that is tested for a TRUE (nonzero) or FALSE (zero) value. Details This command can be used to suspend processing of a monitor command program until a desired condition exists. For example, the state of one or more external signals can be used as the condition for continuation. If the condition parameter is included in a WAIT.START command, the command program is suspended until the condition value makes a transition from FALSE (zero) to TRUE (nonzero). NOTE : The command program is suspended if the condition being tested is already TRUE when the WAIT.START command is executed. A transition from FALSE to TRUE must occur.
The WAIT.START command checks for the specified condition only once every system cycle. Thus, there can be a delay of up to 16 milliseconds between satisfaction of the condition and resumption of program execution. eV+Operating System Reference Guide, 2.x,18321-000 Rev A Page 186