GE B30 Instruction Manual page 233

5 SETTINGS
2. Prepare a logic diagram for the equation to produce virtual output 3, as this output will be used as an operand in the
virtual output 4 equation (create the equation for every output that will be used as an operand first, so that when these
operands are required they will already have been evaluated and assigned to a specific virtual output). The logic for
virtual output 3 is shown below with the final output assigned.
DIGITAL ELEMENT 2
State=Operated
CONTACT INPUT H1c
State=Closed
3. Prepare a logic diagram for virtual output 4, replacing the logic ahead of virtual output 3 with a symbol identified as vir-
tual output 3, as shown below.
VIRTUAL OUTPUT 1
State=ON
VIRTUAL OUTPUT 2
State=ON
VIRTUAL INPUT 1
State=ON
DIGITAL ELEMENT 1
State=Pickup
VIRTUAL OUTPUT 3
State=ON
CONTACT INPUT H1c
State=Closed
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 out-
put 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 below.
5. Following the procedure outlined, start with parameter 99, as follows:
99: The final output of the equation is virtual output 3, which is created by the operator "= Virt Op n". This parameter is
therefore "= Virt Op 3."
GE Multilin
AND(2)
Figure 5–39: LOGIC FOR VIRTUAL OUTPUT 3
Set
LATCH
OR #1 Reset
XOR
Timer 1
Time Delay
on Pickup
(800 ms)
Figure 5–40: LOGIC FOR VIRTUAL OUTPUT 4
01
02
03
04
05
97
98
99
Figure 5–41: FLEXLOGIC WORKSHEET
B30 Bus Differential System
VIRTUAL OUTPUT 3
827027A2.VSD
Timer 2
Time Delay
OR #2
on Dropout
(200 ms)
827029A1.VSD
5.5 FLEXLOGIC
VIRTUAL
OUTPUT 4
5
827028A2.VSD
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