HEIDENHAIN TNC 430 PA/M - Exclusive or (XO)

7 – 110 HEIDENHAIN Technical Manual TNC 426, TNC 430
7.7.23 EXCLUSIVE OR (XO)
Logic processing
with the
EXCLUSIVE OR
command
Syntax: XO (EXCLUSIVE OR)
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. However, you should always begin a sequence of logical
gating operations 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 EXCLUSIVE OR. The TNC saves the result
of the operation in the logic accumulator.
Example:
Gate the inputs I4 and I5 with EXCLUSIVE OR, and assign the result to output
O2.
Initial state:
Input I4 = 1
Input I5 = 1
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
logic accumulator
and input I5 with
EXCLUSIVE OR.
XO I5 x ..... x xxxxxxx0xxxxxxx 1
Assign the gating
result to output O2.
= O2 x ..... x xxxxxxx0xxxxxxx 0