Micromod MOD: 30MLTraining Manual - Manual (Page 175)

Training Manual
Expression Block Lab
11.3.2 Application #1
Find the average pressure between four boiler headers.
Hints: Add 4 analog input (4-20 mA) and corresponding Signal conditioning blocks. Add
an EX block and configure 4 inputs. Use these 4 inputs in your expression to find the
average.
11.3.3 Application #2
Turn on a fan when the temperature is greater than 82 degrees and provided the room door
is not open.
Hints: You need a thermocouple or RTD input and a signal conditioning blocks.
Configure a DIM block for the room door and a DOM block for the fan. Use If Then Else
statement or simple mathematical expression in the EX block.
11.3.4 Application #3
Select the one input out of 4 that is the lowest value.
Hints: Configure 4 inputs. There are more than one ways of configuring this in the EX
block. One of them is to use nested If Then Else statements. Take one input at a time and
compare that with the other 3 inputs to see if it is the lowest.
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