The Logic Diagram - HEIDENHAIN iTNC 530 Service Manual

10.2.2 The LOGIC Diagram

With the LOGIC DIAGRAM function, the time course of the dynamic change of operands
(M, I, O, T, C) can be displayed.
Call
Selection of the 
operands
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 trigger conditions are possible:
1
0
e.g.:
Start the recording
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 Soft key to call the logic diagram function
Press the following keys:

Display selection table
Record when operand is logical on (Triggering on positive edge)
Record when operand is logical zero (Triggering on negative edge)
No trigger:
If no trigger condition is entered for any of the operands, the operand states are
traced the operands are recorded continuously. The 1024 most recent states
remain saved.
0 I5 1
1 O6 0
2 M2003
Note
The WATCH LIST can also be called before and with the soft key ADD TO LOGIC
DIAGRAM operands can be added to the logic diagram.
 Start the LOGIC TRACE function
Note
A recording begins with START TRACE and ends with STOP TRACE and is terminated with
the STOP LOGIC TRACE soft key with the arrival of a trigger event.
During the recording, tracing ... appears over the logic diagram.
If the screen displays a machine operating mode, the signal word PCTR is shown during the
recording.
 Display the Machine mode on the iTNC monitor (key on visual display unit)
PCTR blinking: Trigger condition has not yet arrived
PCTR not blinking: Trigger condition has arrived, buffer is written
PCTR not lit: Buffer full, LOGIC DIAGRAM can be called
Trigger on positive edge
Trigger on negative edge
No trigger
HEIDENHAIN Service Manual iTNC 530