31 – 572 HEIDENHAIN Service Manual iTNC 530 HSCI
31.2 The machine parameter editor
Important notes For service purposes, the service engineer must not only look up values set in the MP list, but he must
also be able to edit them, if required. The MP list is protected against unauthorized editing with a code
number.
Please note the following:
Changes by the
operator
The machine operator can alter machine settings, for example via FN17 commands, NC macros,
cycles or special soft keys.
He will mostly increase safety, e.g., he can reduce the traverse range or the maximum speed.
Only the values in the run-time memory are overwritten, however. The values in the original MP list
on the control's data medium do not change!
Subgroups of
the MP List
It is also possible to call subgroups of the original MP list:
Changes by the PLC The PLC program of the machine manufacturer can read machine parameters and overwrite most
of them!
Normally however, only the values in the run-time memory are overwritten. The values in the original
MP list on the control's data medium do not change!
Another MP file (which of course must exist on the control's data medium) can also be selected by
the PLC.
MP subfiles (subgroups of the original MP file, sometimes with different values) can also be activated
by the PLC. The MP subfile contents are loaded into the run-time memory. All MP values that are not
in this file remain unchanged in the run-time memory.
Examples of changed machine parameters:
Adaptation to achieve special accuracy, speed, surface quality
Different loads
Machine parameters may only be changed after consultation with the machine
manufacturer.
(For this reason some OEMs also determine their own MP code numbers.)
Only edit machine parameters while the control is in "Power interrupted" status or if
EMERGENCY STOP is pressed.
Machine parameters that concern the control loops may only be edited when EMERGENCY
STOP is pressed!
Extensive changes should be made in a test MP list and not in the original MP list.
It is advisable to create a backup of the machine data on an external data medium, if you intend
to make comprehensive changes to the machine settings.
--> See ”Backup on an external data medium” on page 14 – 202.
Call Contents
USER PARAMETERS soft key Up to 16 parameters released by the machine
manufacturer
Code number 123 Parameters defined by HEIDENHAIN
So it is possible that the values in the original MP list (basic data) are not valid at any rate.
It is possible that values in the MP list have been changed for testing purposes; with special
machine functions, however, these values in the run-time memory are overwritten by the
PLC!
If necessary, ask the machine manufacturer which MP files or MP subfiles are active in which
special mode of the machine, or which parameters are overwritten by the PLC!
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