Future Design MCTB 4.3, User Manual

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MCTB
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S2_PV Loop 2/Limit (slot 2) process value.
S2_SP Loop 2 (slot 2) set point value. Only available a B42 is installed in slot 2.
S2_%Out Loop 2 (slot 2) percentage of output. Only available a B42 is installed in slot 2.
S3_PV Loop 3/Limit (slot 3) process value.
S3_SP Loop 3 (slot 3) set point value. Only available a B42 is installed in slot 3.
S3_%Out Loop 3 (slot 3) percentage of output. Only available a B42 is installed in slot 3.
M1-M20 Math equation 1-20 result. The tagname entered for the math block will also be shown in
parenthesis to assist in identification of each math result, i.e., M1 (
Tagname ).
For logic equations, an additional menu is provided that allows you to select from the available loop event inputs
and event outputs which correspond to the items listed under the Trigger selections above. If any equations
are configured as the Timer type, they will also be provided as T1 to T20. The tagname of the equation will
appear after the “T” designator for reference. If equation 5 was configured with the tagname “Cool Dly” the
menu item would be displayed as “T5 (Cool Dly)”. When selected as an input, the value would be displayed in
the equation as simply “T5”. Additionally, if any soft alarms have been configured, they will also be available
for selection in a logic equation. They will be provided in the drop-down menu as SA1 to SA10 corresponding
to soft alarms 1 through 10.
The
Dec Pos entry field is available for math equations only. It allows precision of the math equation result to
be adjusted between 0 and 3 decimal digits for display on the Overview screen in the runtime application and
is also reflected in the value written to the data log file if the point if chosen for logging.
Any time during equation entry, you can test the validity of the equation by touching the entry field. The equation
is also automatically tested when
the “Done” button is pressed.
Only a valid equation can be saved. If the equation cannot be properly solved, you will not be able to exit the
screen until the equation is corrected or cleared.