GE Industrial Solutions Entellisys 5.0 User Manual - Manual (Page 211)

FlexLogic example 201
11
that will be used as an operand first, so that when these operands are required they have
already have been evaluated and assigned to a specific virtual output). The logic for Virtual
Output 3 is shown with the final output assigned in Figure 11-3.
Figure 11-3 Logic for Virtual Output 3
3. Prepare a logic diagram for Virtual Output 4, replacing the logic ahead of Virtual Output 3
with a symbol identified as Virtual Output 3, as shown in Figure 11-4.
Figure 11-4 Logic for Virtual Output 4
4. Program the FlexLogic equation for Virtual Output 3 by translating the logic into available
FlexLogic parameters. The equation is formed one parameter at a time until the required
logic is complete. It is generally easier to start at the output end of the equation and work
back towards the input, as shown in the following steps. It is also recommended to list
operator inputs from bottom to top. For demonstration, the final output will be arbitrarily
identified as parameter 99, and each preceding parameter decremented by one in turn.
Until accustomed to using FlexLogic, it is suggested that a worksheet with a series of cells
marked with the arbitrary parameter numbers be prepared, as shown in Figure 11-5.
Figure 11-5 FlexLogic worksheet
a. Following the procedure outlined, start with parameter 99, as follows: