Eliminated from:
9400 HighLine SW V7.0
Behaviour of the new version?
The resolution of an application unit is shown in C2532 without decimal positions, i.e. the data format of this code is different to how it was in previous firmware versions (previously there were four decimal positions, whereas now there are none). This means it is now possible to show a display range that is 10,000 times larger than before, without exceeding the internal display limit of 2^31 – 1.
Description of the problem
With certain measuring system settings, display code C2532 (resolution of an application unit) reaches its internal display limit of 214,748.3647[incr./unit].
When does the problem occur?
The behaviour occurs if the values for the gearbox ratio, feed constant and shift factor exceed the limit value of 214,748.3647 [incr./unit] according to the following formula:
C2532 = (2^C0100 / C2524) * (C2520 / C2521)
Which products are affected?
9400 HighLine SW ≤ V5.1
Diagnostics options?
The behaviour occurs if the calculated value for display code C2532 (see the above formula) exceeds the limit value of 214,748.3647 [incr./unit]. In this case, C2532 shows the maximum limit value that can be displayed, i.e. 214,748.3647 [incr./unit].
Short-term measures/recommendations?
If C2532 is used as the basis for (external) position conversions between application units and incremental units, select a different type of scaling for feed constant C2524, cycle C2536 and unit data C2525/C2526 (e.g. by rescaling from [m] to [cm]).
If C2532 is only used for display purposes, the functional restriction does not have any further impact.
Evaluation:
The behaviour only affects display code C2532, which does not have a direct influence on the function of the controller. In some applications, this code is read by master controls via SDO data exchange and used to perform conversions between incremental units and application units. Modifications may need to be made in the master control for applications of this type.
Published with Service Message No. 38/2009
