Micromod RetroPAK: SLC Configuration Manual - Manual (Page 291)

Function Code 65 – Digital Sum with Gain
GENERAL DESCRIPTION
This function computes the weighted sum of up to four Boolean inputs.
The output equation is:
Output = S5* S1 + S6* S2 + S7*S3 + S8*S4
It can be used to initiate a control action based on the number of Boolean inputs that have
a status of logic 1. These inputs could represent the status of pumps, valves, motors, etc.
UTILIZATION
The MOD 30ML/MODCELL compound FC65 used here has an EX function block
(Expression block) with four inputs S1, S2, S3 and S4 and four constants that are (S5 –
S8) that are input gain parameters. Output value is the weighted sum of the four boolean
input signals
Figure 65 .1.
Function Code 65
EXPLANATION
Function code 65can also be used as a 2 input or a 3 input adder by specifying values for
the unused inputs as zero and by not connecting them to any attributes.
See the Input configuration page of the EX block in the next figure.
External signals can also be connected to the four input gain parameters (S5 – S8)
65 - 1