April 2013 1.9 PLC functions 55
If the PLC program Basic_54 is used and the message "Debug functions of
the PLC are active" occurs, you need to correct the PLC project with respect
to M4753 or set MP4020 bit 17, because M4753 is set permanently in this
version of the PLC basic program.
More information on the use of M4751, M4752 and M4753:
The markers may be used for debugging only temporarily and must not
be set in the factory default setting of a PLC.
M4753 is/was set permanently by the PLC basic program Basic_54.
MP 4020 bit 17 must be set in order to suppress the message without
having to modify the PLC program.
A maximum of 1 MB of data can be written to the file
PLCMODULES.LOG; any data exceeding this limit will be copied to
.OLD.
A maximum of 2 MB is available for both the file PLCMODULES.LOG and
the file PLCMODULES.LOG.OLD. With the PLC basic program for
example, the 2 MB are exhausted some seconds after the power
interrupted message has been acknowledged if all debug markers are
set.
During debugging in the PLC program, it is advisable to position the
markers as close as possible to the code position to be examined, and
not for the complete PLC scan.
On OEM machines, PLC debug code that has been output for debugging
must afterwards be replaced by the original code again.
To Next Page
Loading...
