Virtual Channels Sample Clauses

Virtual Channels. This program component is used to create virtual channels. Two lists are included in the window. The left-hand list shows the names of the channels for the currently selected summator (source channels). The entries in this list can be selected with the left mouse key, or with the space bar. Generally speaking, a new selection clears the previous selection. However, If the shift key is pressed and held, a range of entries (from to) can be selected within the list, and if the Ctrl key is held and depressed, single entries can be added to the current selection at will (e.g. for the selection of non-consecutive entries). The buttons between the two lists are used to move the channels into the destination list (which is later used as a basis for the generation of the command line). Depending upon which button is used, different weighting factors are applied (+1, -1 or the factor displayed in the data entry field underneath the x► key). The key with the ◄ arrow enables the user to remove channels which have been inadvertently moved into the destination list. The entries in the right- hand list remain unchanged when a new summator is selected. This allows for the creation of virtual channels beyond the physical limits of the summator. The data entry field for the number of the background program determines which background program is to be used for the calculation of virtual channel data. Reference to the background program with this number is kept up to date by the program, i.e. if a background program with the selected number exists, it is displayed for control purposes. Before the command line is finally created with the Generate button, an entry from the left-hand list must be selected as a destination channel for generation of the virtual channel. A command line might appear as follows: H0='A:DVSUM 6+7, A:DVSUM 10+11 5.5, A:DVIRT V1=' Due to the fact that the generated command line is written to a text entry field, manual correction is possible before the line is transmitted. When the Transmit button is activated, the command line is transmitted to the current summator as a background program.