July 2013 8.1 Display and operation 1197
Using PLC modules to call CHM files created by the OEM:
PLC Module 9391 is introduced, with which a PLC error message is
displayed, and in addition an offset is added to the value of the error number
(= ONL Number) in the .PET table in order to generate the actual help
number. This way a group error number can be defined for an (OEM) device
in the .PET table, and the error number (used as an offset) supplied by the
device in case of error then leads to the appropriate help text. This requires
an OEM-specific *.CHM file, which must be indicated in the .PET table (=
ONL Name).
Additionally, PLC Module 9390 is also introduced, with which a help window
can be opened directly by the PLC.
Every possible way of calling your OEM help file offers you the possibility of
showing the entire directory (including HEIDENHAIN help files) in the directory
tree, or just the directory of your OEM help file. This selection is made when
calling the help file. If you enter main.chm as the help file in the call (via PLC
module, *.PET file, soft key or NC error), then the entire directory is shown. If
you enter your OEM help file OEMx.CHM as help file in the call, then only the
directory of your help file is shown.
Files and structure
of the help system
All online help available on a control can be called separately as well as within
the online help system. In order for the call within the entire system to
function, the conditions described below must be followed:
The help system is structured as follows:
main.chm – Welcome page of the help system
• jh1.chm
• jh2.chm
•...
• oem1.chm
• oem2.chm
• oem3.chm
•...
The HTML pages of the individual online help topics exist completely
independently of each other. Special entries combine the tables of contents
and collate the index entries (see below).
Table of contents
The table of contents of main.chm contains "merge" objects:
<OBJECT type="text/sitemap">
<param name="Merge" value="oem1.chm::/merged.hhc">
</OBJECT>
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