HEIDENHAIN TNC 335 Technical Manual - Manual (Page 451)

7-72
TNC 360 3 Commands 8/95
Examples for the commands AND [ ], AND NOT [ ], OR [ ], OR NOT [ ], EXCLUSIVE OR [ ],
EXCLUSIVE OR NOT [ ].
With the use of parentheses, an instruction listing may be developed according to the following logic
block diagram.
M500
ο
OR
M501
ο
AND
ο
O12
I0
ο
OR
I1
ο
Initial state: Marker M500 = 0Input I0 = 0 Output O12 = ?
Marker M501 = 1Input I1 = 1
Line Instruction Accumulator Contents Operand Contents
bit 31 7 0
... x x x x x x x x x x x x x x
Program-stack:
1 L M500
2 O M501
3 A [
4 L I0
5 O I1
6 ]
7 = O12
xxxxxxxx 1 xxxxxxx
bit 7 0 15
... x x x x x x 0 x x x x x x x
... x x x x x x 1 x x x x x x x
... x x x x x x 1 x x x x x x x
... x x x x x x 0 x x x x x x x
... x x x x x x 1 x x x x x x x
... x x x x x x 1 x x x x x x x
... x x x x x x 1 x x x x x x x
0
1
0
1
1
Line 1: Marker state M500 is loaded into the Logic Accumulator.
Line 2: The Logic Accumulator is gated with Marker M501.
Line 3: Open parentheses: the Accumulator contents are buffered on the Program Stack.
Line 4: Input state I0 is loaded into the Logic Accumulator.
Line 5: The Logic Accumulator is gated with Input I1.
Line 6: Close parentheses: Accumulator content is gated with the content of the Program Stack,
according to the command (A[, O[, NO[ ...).
Line 7: The result of the complete logical process is assigned to Output O12.
Note:
The functional sequence is in principle the same for word execution, with the exception that the
whole Accumulator is written onto the Stack.