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Section 4 - Monitoring Motors with MCMScada
Figure 25: The MCM Unit Information dialog showing the settings The two tables are viewed as pages in a tabbed dialog. When a page is opened, it is necessary to press the Read button in order to download the latest information from the MCM unit. In order to change a setting (parameters are read only), the MCM unit must first be sent to IDLE as explained in Section 4.2 and the Read button pressed. Left clicking on the value to be changed will both highlight the value and cause it to be written into the box underneath the grid, where it can be edited. To update the new value, press Write. Once the MCM unit has received the new value MCMScada again reads automatically all the settings and displays them in the grid, upon which the newly set value should be displayed. If the MCM unit has rejected the change (usually as a result of not being in the IDLE state) the value in the grid will remain unchanged. 4.7 Trending MCMScada allows the plotting of values of selected MCM parameters using the Trending facility. Two sets of data are available for plotting: o Short‐term data obtained at every iteration of MCM over the immediate last few days. o Long‐term data, representing the average of short‐term data over a windowing period. The properties of both trending types can be set for each local node by selecting the node, right clicking and then selecting Trend Settings from the Node Settings sub menu. 31