HEIDENHAIN TNC 415 (259 9x0) Service Manual - Manual (Page 142)

SERVICE MANUAL TNC 415B/425
Page 137
Issue: 20.08.95
19.4 Diagnosis Possibilities in the PLC Mode
19.4.1 TRACE Function
Activation via soft key
The TRACE function provides the possibility of controlling the logic states of the markers, inputs, outputs,
timers and counters; it also serves to check the contents of bytes, words and double words of the compiled
PLC program.
An instruction list (AWL) of the compiled 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 GOTO function to display the requested program part.