7 – 86 HEIDENHAIN Technical Manual TNC 426, TNC 430
7.7.3 LOAD (L)
Logic processing
with the LOAD
command
Syntax: L (LOAD)
Operands: M, I, O, T, C
Action:
Load the value 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 inputs I4 and I5 with AND, and assign the result to output O2.
Initial state:
Input I4 = 1
Input I5 = 0
Output O2 = ?
Function STL Accumulator contents [bit] Operand contents [bit]
31..15 .................... 7 ................. 0
Load the operand
content into the logic
accumulator.
L I4 x ..... x xxxxxxx1xxxxxxx 1
Gate the content of
the logic
accumulator and
input I5 with AND.
A I5 x ..... x xxxxxxx0xxxxxxx 0
Assign the gating
result to output O2.
= O2 x ..... x xxxxxxx0xxxxxxx 0
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