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LINK TechBox/TechCard Instruction Manual - HA470016 Issue 5
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No user settings are necessary for this block. When the
Tag Load
input goes high, the
‘loadable’ writers insert their current values to the respective drive tags.
Double-click on the System Control block to access the three restart preferences, as shown
above. In most cases, the defaults are sufficient. For details, refer to the ConfigEd instruction
manual (RG353792).
Link Data Types
The three types of data in
LINK
are Logic, Ordinal and Value.
Logic Signals
Used for all logic functions, they are True or False signals that take the form of 1 and 0.
True = 1, False = 0
All Logic function blocks in
LINK
, operate this way.
Note: Logic 1 = Ordinal 1, Logic 0 = Ordinal 0
Ordinal Signals
Ordinals are whole, unsigned integers, used mainly for counters and enumeration. These
numbers range from 0-32,767 or 0-65,535.
Value Signals
These are used for signal processing. The range of values is –1 to +1 in
LINK
, represented by
–100% to +100% in DSD or ConfigEd.
Scaling
There is no over-range built into the
LINK
Value number. This means that the maximum
value a number can take is 1.0. In drives and control systems, an over-range is necessary to
allow feedback control of a variable when it is operating at full range. Therefore, an over-
range must be built into the number range when the system is being configured. It is for this
reason that
LINK
values for certain different variables have different scaling properties. These
rules need to be followed in the
Link
system design when interfacing the techbox with other
LINK
function blocks.
Generic values
These are values that need no over-ranging.
100% of the variable = 100% in LINK
Example: A speed ratio signal. Range 75% to 100%
Use the Value Reader 100 and Value writer 100 blocks in your techbox configuration.
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