HEIDENHAIN TNC 430 PA - Load Not (Ln)

7 – 88 HEIDENHAIN Technical Manual TNC 426, TNC 430
7.7.4 LOAD NOT (LN)
Logic processing
with the LOAD NOT
command
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 = ?
Function STL Accumulator contents [bit] Operand contents [bit]
31..15 .................... 7 ................. 0
Load the inverted
operand content into
the logic
accumulator.
LN I4 x ..... x xxxxxxx1xxxxxxx 0
Gate the content of
the logic
accumulator and
input I5 with AND.
A I5 x ..... x xxxxxxx1xxxxxxx 1
Assign the gating
result to output O2.
= O2 x ..... x xxxxxxx1xxxxxxx 1