West Control Solutions CALogix - Manual (Page 31)

Logic I/O Module and Logic Programming
OVERVIEW
CALogix has integrated logic function capability that can be used for controlling a system by linking associated inputs and
outputs using logic, timer, counter and comparator functions.
A logic programming utility is included within CALogix-sw that can be used to create logic function block diagrams when a
CALogix system has logic I/O modules fitted. The logic programming memory will allow programs up to 40 Boolean blocks
or up to 16 timers/counters depending on the complexity of the blocks used i.e. some function blocks (e.g. timers) have
been developed by using several other function blocks and will therefore require more memory.
LOGIC I/O MODULE SETTINGS
To access logic I/O settings right mouse click on the controller image, mouse over properties then click on the module
number (module slot number must have logic I/O module fitted)
The settings window will now open.
A user-defined label (name) for the module can be entered in the module name field, once a label is entered click on the
apply button to write the label to the controller. This label will be visible on the controller image in CALogix-sw and will be
included when the application is exported to .rtf files. The label can have a maximum of 10 characters
Input 1,2,3 range
The voltage range of inputs 1, 2 and 3 can be user-defined as one of three voltage ranges i.e. 0-24V, 0-10V and 0-5V.
These voltages are used to determine high and low states for logic functions and also for comparator switching levels.
Voltages above 66% of the input range will be considered as high state and below 33% as low state e.g. for a 0-10V input
range <3.3V = low logic state (0) and >6.6V = high logic state (1).
Comparators will convert the input level to a percentage of full scale and will be compared against other inputs or a
constant. e.g. With an input range of 0 - 24V, an input voltage of 2.4V will be considered to have a value of 10.0 in a
comparator block.
Each of the inputs can be independently set for a different voltage level input. Once each input has been set, write the
settings to the controller by clicking the apply button.
LOGIC PROGRAMMING
CREATING LOGIC PROGRAMS
ACCESSING LOGIC PROGRAMMING
1) Click icon on main toolbar
2) Logic programming desktop should now open
THE LOGIC TOOL BAR
Create Boolean function block
AND, OR, XOR, LATCH, NAND, NOR, XNOR boolean function block can be created
See section on Boolean function blocks.
Create comparator function block
Compare two I/O module inputs or compare an I/O block input with a constant. ‘greater than’ or ‘less than’
comparator options. See section on comparator blocks.
Create timer/counter function block
Select one of eleven timer types or two counter types. See timers/counters overview section.
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