HEIDENHAIN TNC 430 PA/M - And (A)

7 – 102 HEIDENHAIN Technical Manual TNC 426, TNC 430
7.7.19 AND (A)
Logic processing
with the AND
command
Syntax: A (AND)
Operands: M, I, O, T, C
Action:
n At the beginning of a logic sequence, this command functions like an L
command, i.e., the logical state of the operand is loaded into the logic
accumulator. This is to ensure compatibility with the TNC 355, which does
not have the special L command. In PLC programs, a sequence of logical
gating operations should always begin with a load command (see L, LN, L–).
n Within a logic sequence, gate the content of the logic accumulator and the
logical state of the operand with AND. The TNC saves the result of the
operation in the logic accumulator.
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