2 set-commands, 1 set (s), 2 set-commands 3.2.1 set (s) – HEIDENHAIN TNC 407 (243 020) Technical Manual User Manual
Page 509
3.2 Set-Commands
3.2.1 SET (S)
Abbreviation for the PLC Editor:
S (SET)
Operand changed
Operand unchanged
Execution time [µs]
0.1 to 0.8
0.2 to 0.5
Number of bytes
8 (6)
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 depends on the contents of the Logic Accumulator. If the Logic
Accumulator = 1, the addressed operand is set to 1, otherwise the operand remains unchanged. An
S-command is used at the end of a logic chain so that the gating result may influence the operand.
The command may be used several times in succession (see example).
Example:
Input I4 and input I5 should be gated with OR.
If the gating result is 1, output O2 and marker M500 should be set.
Initial state:
Input
I4
= 1
Input
I5
= 0
Output
O2
= ?
Marker
M500 = ?
Line Instruction
Accumulator Contents
Operand Contents
Bit
31
.
.
.
7
0
... x x x x x x X x x x x x x x
1
L I4
... x x x x x x 1 x x x x x x x
1
2
O I5
... x x x x x x 1 x x x x x x x
0
3
S O2
... x x x x x x 1 x x x x x x x
1
4
S M500
... x x x x x x 1 x x x x x x x
1
Line 1:
The contents of the operand 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 = 1: output O2 is set.
Line 4:
The gating result = 1: marker M500 is set.