Load Not (Ln) - HEIDENHAIN TNC 426 PB/M Technical Manual

7.7.4 LOAD NOT (LN)

Logic processing
with the LOAD NOT
command
Function
Load the inverted
operand content into
the logic
accumulator.
Gate the content of
the logic
accumulator and
input I5 with AND.
Assign the gating
result to output O2.
7 – 88
Syntax: LN (LOAD NOT)
Operands: M, I, O, T, C
Action:
Load the complement of the addressed operand into the logic accumulator.
Always use the L command at the beginning of a logic chain in order to be able
to gate the operand in the following program sequence.
Example:
Gate the inverted logical state of inputs I4 and I5 with AND, and assign the
result to output O2.
Initial state:
Input I4 = 0
Input I5 = 1
Output O2 = ?
STL Accumulator contents [bit]
31..15 ....................
LN I4 x ..... x x x x x x x x 1 x x x x x x x
A I5 x ..... x x x x x x x x 1 x x x x x x x
= O2 x ..... x x x x x x x x 1 x x x x x x x
7 ................. 0
HEIDENHAIN Technical Manual TNC 426, TNC 430
Operand contents [bit]
0
1
1