HEIDENHAIN TNC 306 Technical Manual - Manual (Page 317)

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TNC 416/TNC 406/TNC 306 Commands 7-27
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 are to be gated with AND and the result assigned to Byte B8.
Initial state: Byte B5 = 2A (hex)
Constant: 54 = 36 (hex)
Byte B8 = ?
Line Instruction Accumulator contents Operand contents
Bit 31 . . . 15 7 0 7 0
... x x x x x x x x x x x x x x x x x x
1 L K+54 ... 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1 0
2 A B5 ... 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 00101010
3 = B8 ... 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 00100010
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.