Command Tab Sample Clauses

Command Tab. 4a & 4.4b show microDAQX's command tab, which allows the user a degree of manual control over the microDAQ unit while it is running. The actual command set available is detailed separately in the 'microDAQ user programming guide document, and within microDAQX is implemented as user controls. The 'Status' command is implemented separately on the Information tab. Note that Figures 4.4a & 4.4b show the form after the ‘Show Controls’ check box has been ticked. It should be emphasised that the controls that are associated with a command parameter (for example the data delivery rate of a channel) do not necessarily show the current state of the parameter within the microDAQ. The microDAQ powers up with the settings programmed into it from the microDAQSetup front end software and the command buttons on microDAQX allow the modification of certain parameters (to the values selected in the dropdown boxes), but only until the next reset. It is therefore unlikely that the parameter value within the microDAQ unit matches that of the microDAQX display, unless the microDAQX controls have been used to change that value since a reset. Clicking a command button formats and sends the appropriate command packet to the microDAQ. The microDAQ will respond with an acknowledge, however if the communication settings are set so both command and data use the same channel, unless data streaming is turned off beforehand, it is possible that this acknowledge will be lost in a data packet. Under these cirumstances, a message on the caption bar of the main form informs the user of no positive acknowledgement within the timeout period, however it is likely that the command has been implemented successfully. A successfully acknowledged command will also be shown in the caption bar.