Word Execution With The Load Command - HEIDENHAIN TNC 415 Technical Manual

Word execution with the LOAD command

Operands: B, W, D, K
Operation:
The addressed Operand (B, W, D) or a Constant (K) is copied into the Word Accumulator. In addition,
the Accumulator is filled, if necessary, according to the sign bit. In contrast to logic execution the
start of a word gating chain must always be with the L command. It is not possible to use a gating
command.
Example:
A Constant and Byte B5 is to be gated with AND and the result assigned to Byte B8.
Initial state:
Line Instruction
Bit
1 L K+54
2 A B5
3 = B8
Line 1: The Constant is loaded into the Word Accumulator.
Line 2: The contents of the Word Accumulator and Byte B5 are gated with AND.
Line 3: The gating result is assigned to Byte B8.
01.98 TNC 407/TNC 415/TNC 425
Byte B5 = 2A (hex)
Constant: 54 = 36 (hex)
Byte B8 = ?
Accumulator Contents
31 . . . 15
... x x x x x x x x x x x x x x x x x x
... 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1 0
... 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0
... 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0
3 Commands
7 0
Operand Contents
7 0
00101010
00100010
7-37