4-66 B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUALFLEXLOGIC DESIGN USING ENGINEER CHAPTER 4: INTERFACES46. Double-click the block on the sheet to configure it, selecting from the two drop-down lists. The figure shows thatvirtual input 61 is being added. The View Associated Screen button opens its settings window.Figure 4-70: Configuring an input block7. Add the output blocks to the logic diagram. For example, click the I/O Tokens tab, click the Virtual Output element,then click in the logic sheet to add it. Double-click the block on the sheet to configure it. For the name, make it unique.The figure shows virtual output 61 is being added, with a suffix of "io" added to the name to make it unique. Note thatthe outline color of a block is red until it is configured, and that this properties window varies by block and theselectable options by order code.Figure 4-71: Configuring an output block8. Connect the input blocks to the output blocks by drawing a line as follows. Click the Drawing Tools tab, then select theLine option. The cursor needs to be at the connection point to end the line, not elsewhere on the block. Note that theoutline color is no longer red on the blocks.