HEIDENHAIN iTNC 530 Service Manual page 259

Selection of  Press the following key combination:
operands and start
of recording
A table appears in which the desired operands can be selected. The individual positions in
the table are interrogated using dialog. Incorrect entries can be deleted with DEL key.
A trigger condition can be set for each operand. 512 states are recorded each before and
after a trigger event. The following are possible trigger conditions:
"1"
"0"
e.g.:
A recording begins with START TRACE and ends with STOP TRACE or with the arrival of
a trigger event.
PCTR blinking:
PCTR not blinking: Trigger condition has arrived, buffer is written.
PCTR not lit:
July 2002
 Display selection table.
Record when operand logical "1" (trigger on positive edge)
Record when operand logical "0" (trigger on negative edge)
No trigger:
If a trigger condition is not entered for any of the operands, the operand statesare
recorded continuously and the last 1024 are always saved.
0 I5 1 Trigger on positive edge
1 O6 0 Trigger on negative edge
2 M2003 No trigger

Start TRACE function.

iTNC in Machine mode (key on visual display unit).
Trigger condition has not yet arrived.
Buffer full, LOGIC DIAGRAM can be called.
 Switch to TRACE mode.
 Call the logic diagram.
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