HEIDENHAIN TNC 407 (243 020) Service Manual - Manual (Page 99)

HEIDENHAIN
JOHANNES SERVICE MANUAL TNC
01.09.1995
Paw 82.1
17.3 Further Diagnosis Possibilities in the PLC Mode
The TRACE function provides the possibility of controlling the logic states of the markers, the inputs and
outputs, of the timer and the counter. It also serves to check the contents of bytes. words and double words.
Call the TRACE function from the PLC main menu with the soft key TRACE.
An instruction list (AWL) of the compiled program (process program) is displayed. In addition, the contents
of the operand and of the accumulator is displayed in HEX code or decimal code. All active commands of
the instruction list are marked by Use the cursor keys or the GOT0 function to display the requested
program part.
The following soft-key row is displayed:
SELECT LOGIC HEX START
DIAGRAM DISPLAY
DECIMAL
STOP
DISPLAY
START
TRACE
STOP
TRACE
END
Explanation of the soft keys:
L
SELECT
see section 17.3.2
see section 17.3.2
Display of the operand contents or
r - l
START
DISPLAY
Dynamic display of operands and accumulators stopped
STOP
DISPLAY
Dynamic display of operands and accumulators
see section 17.3.2
r l
STOP
TRACE
see section 17.3.2
END Exit to PLC main menu