09.01 12 Functional Descriptions
12.19.5 Interpolation and compensation with tables
12.19.5.9 Viewing the IKA data during programming
The IKA data can be viewed during programming if the following conditions are fulfilled:
The IKA editor consists of list module displays used for display only, i.e. the input fields are
greyed out.
• The IKA data are to be found under the workpieces (LOCAL/<workpiece_name>).
• The display is only possible "off-line".
• Function "new" deactivated, i.e. it is only possible to view existing data.
• Function "search" deactivated in the list module display.
• Functions "Copy to clipboard" and "Paste from clipboard" deactivated.
The softkey bar has been extended in programming by a new softkey "View IKA data".
Note:
Before pressing the softkey "View IKA data", an IKA file must be selected with the data
selector, otherwise the error message "No data selected" is output.
Saving IKA data
In the MMC area Services, the IKA data are saved in directories such as NC/Data or
LOCAL/<workpiece> previously selected with the data selector. The selection list for the NC
source (toggle field) is extended by file types IKA1, IKA2 and IKA3, a range can be defined
(from/to) and a PC name can be assigned.
Loading IKA data
The data are loaded from the workpiece by selecting the file with the data selector or via the
job list.
12.19.5.10 Compensation beyond the working area
If the compensation position of an IKA axis lies beyond the working area (i.e. the minimum of
working area limitation or SW limit switch), the axis is stopped, even if the set position still lies
within the working area.
This axis stop may, in some cases, lead to "free grinding in the workpiece". The functional
supplement has been created to ensure a user-configurable, automated reaction.
By means of MD bit 5198.7(=1), the interface signal DB48 DW 9 bit 0 "Compensation position
beyond the working area" is enabled.
Definition: DB48 DW 9 contains signals from NCK to PLC.
The "Compensation position beyond the working area" interface signal is a group signal for all
IKA "compensation" axes. The interface signal is set (=1) if the compensation position of at
least one of these axes lies beyond the software limit switch or the working area limitation.
In addition, the alarm 3265 "IKA output axis not enabled" is output depending on the condition
that the MD bit 5189.5 (suppression of alarm 3265) has not been set.
The interface signal is automatically reset (=0) if the compensation positions of all axes are
again within the working area (e.g. retraction via JOG or compensation change via the basic
axis).
Application example:
By means of this new interface signal the machine manufacturer can configure an emergency
retraction via the rapid inputs. This avoids "free grinding" in the workpiece.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
12–211
SINUMERIK 840C (IA)