1286 HEIDENHAIN Technical Manual iTNC 530 HSCI
8.1.29 Logs
PLC log In order to make debugging in PLC programs easier, the following markers can
be used to record additional PLC module calls and their parameters. The data
are written to the log file PLC:\JHPLCLOG\PLCMODULES.LOG.
If one of the three markers is set, this results in the one-time NC error
message "Debug functions of the PLC are active." The other log files
PLCDEBUG.LOG, MYDEBUG.LOG, VERSION.TXT, VERSION.LOG and
MakeCycle.log are contained in the directory PLC:\JHPLCLOG\.
The marker should be set only for debugging purposes. Otherwise,
unnecessary access to the hard disk will put a strain on the system. The
following events are entered:
Start of the PLC after switch-on.
Start and stop of the PLC.
Errors from PLC modules (this entry is only made if M4753 = 1).
Run-time errors
Set Reset
M4751 Recording of transfer and return
parameters of PLC modules that are
called in the cyclic PLC program
PLC PLC
M4752 Recording of transfer and return
parameters of PLC modules that are
called in submit/spawn processes
PLC PLC
M4753 Writing errors from PLC modules to
the PLC log
(PLC:\JHPLCLOG\PLCMODULES.LOG)
PLC PLC