Reset Not - HEIDENHAIN TNC 415 Technical Manual

3.2.4 RESET NOT (RN)
Abbreviation for the PLC-Editor:
Execution time [µs]
Number of bytes
Byte value in parentheses:
With certain preceding program sequences the command may be shortened.
Operands: M, I, O, T, C
Operation:
The function of the command is dependent upon the contents of the Logic Accumulator. If the Logic
Accumulator = 0, then the addressed operand is set to 0, otherwise the operand remains
unchanged. An RN command is used at the end of a logic chain, in order that a gating result may
influence the operand. The command may be used several times in succession (see example).
Example:
Input I4 and Input I5 are to be gated with OR.
If the gating result = 0, Output O2 and Marker M500 are reset.
Initial state:
Line Instruction
Bit
1 L I4
2 O I5
3 RN O2
4 RN M500
Line 1: The operand contents are loaded into the Accumulator.
Line 2: The contents of the Logic Accumulator and Input I5 are gated with OR.
Line 3: The gating result = 0: Output O2 is reset.
Line 4: The gating result = 0: Marker M500 is reset.
01.98 TNC 407/TNC 415/TNC 425
RN (RESET NOT)
Operand changed
0.1 to 0.8
8 ( 6 )
Input I4 = 0
Input I5 = 0
Output O2 = ?
Marker M500 = ?
Accumulator Contents
31 . . .
... x x x x x x X 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 0 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 0 x x x x x x x
3 Commands
Operand unchanged
0.2 to 0.5
7 0
Operand Contents
0
0
0
0
7-51