Rockwell Automation 5370-CVIM2 Module - Manual (Page 39)

Chapter 2
CVIM2 System Configuration: An Overview
2–16
it appears in the display window above the keys. The maximum number of
digits that you can enter is 10.
Some keys appear in shaded type, which indicates that they are inactive in
the keypad’s current mode of operation. For example, when the decimal
mode is selected, the hexadecimal alpha keys are shaded.
Here is a brief description of the keys:
•
Digit keys –– These keys enter numeric digits in the display window.
•
Operator keys –– These keys perform mathematical operations on the
numbers entered in the display window: The (
B) key performs a divide
operation; the (
) key performs a multiply operation; the ()) key
performs an addition operation; the (
*) key performs a subtraction
operation, and the (
%) key performs a percentage operation. The (+) key
completes the mathematical operation and displays the result in the
display window.
•
Sign key –– The (
") key changes the sign of the operand to minus (*) if
it is plus, or vice versa. (The plus sign is never displayed.)
•
*Decimal key –– This key is active only when floating point values are
involved. At all other times the decimal (.) in the key appears in shaded
type, indicating that the key is inactive.
•
Backspace (
²) key –– This key moves the cursor one place to the left
and deletes the digit at that position.
•
Clr (clear) key –– This key clears all digits from the display window.
•
Base key –– This key selects the “base” of the numbering system to be
used: DEC for decimal (base 10), HEX for hexadecimal (base 16), BIN
for binary (base 2), or OCT for octal (base 8). The various bases appear in
succession when you pick this key repeatedly.
Note that the digit keys that are non–functional with each base appear in
shaded type; thus, all but digits 0 and 1 are shaded in the BIN mode.
•
Orig (original) key –– This key restores the original contents of the
display window when the keypad first appeared.
•
Esc (escape) key –– This key exits the keypad without altering the
original value that appeared in the display window.
•
Done key –– This key saves any changes to the original value in the
display window and exits the keypad.
* The calculator operates in the integer mode for most operations, and all
fractional results from calculations are thus truncated. For example, the
result from 100
B 6 would appear in the calculator display window as 16,
not 16.6667. Some operations, however, such as a gage using the linear
measurement operation, use floating point numbers for inspection results.
The decimal key is active when you set range limits for those results. Thus,
the result from 100
B 6 would appear in the display window as 16.667 in
this case.