Viewing or changing the current parameter values

The safety parameter editor provides the possibility to be informed about the current configuration of safety relevant hardware devices and to change the values:

1. Expand the group with the parameter value: Click on the icon  which is displayed in front of the group name or click on the name of the group itself. Or navigate to the icon   by using the Tab-key and press the Enter-key.

2. Repeat expanding the groups until the parameter value is visible.
   Alternative: Expand all groups at once by clicking Expand all in the control bar. Or navigate to Expand all by using the Tab-key and press the Enter-key.

3. Make sure that the column Value shows the correct value of the parameter.
   The type of the value determines how the value is displayed in the safety parameter editor. If Neuron Power Engineer is set up accordingly by the system integrator, hexadecimal numbers are prefixed with 0x.
    When you hover over the field for Value, a tooltip informs you about the parameter data. Details: see "Components of the safety parameter editor".

4. If you want to change this value, proceed as follows:

   1. Click in the field for the column Value. Change the value depending on the parameter: Specify the new value in the field, select the value from the given list or check the checkbox (or uncheck an existing checkbox).
      Result: The field for Value is highlighted with a yellow background color, as long as the change is not confirmed.

   2. Required for an entry field only: Confirm the change by pressing the Enter-key, clicking into the next field or pressing the Tab-key (to go to the next field). Press the ESC-key, if you want to discard your changes (in this case the original value will be restored).
      Result in case of a correct change: The background color of the field reverts back to white.
      Result of an incorrect change (see the illustration under "Hardware parameterization using the safety parameter editor"): The field is highlighted with a red background color. In addition, a message (an error) in the line below the incorrect parameter informs about the incorrect value. In this case, correct the value correspondingly.
      

5. If the column Commissionable contains a check box, you can additionally decide whether this parameter can be changed at application runtime. If yes, check this box. If not, do not check it.
   If the check box is activated, additional rows are displayed where you can configure the values of the commissioning parameters, for example Default value, Min or Alternative name. Changes to the commissioning parameters are highlighted in the same way as the parameter values described above.

6. Repeat the steps 4 and 5 for each value you want to change. 

Observe the following behavior for a floating-point value using the exponent notation, such as 3.1415167e2: In this case, the safety parameter editor converts the specified value to a notation without the exponent. The field for Value is highlighted with a red background color and an error informs you about the suggested conversion to a value without the exponent. You have to correct the value accordingly.

Due to the internal representation of floating-point numbers, the safety parameter editor expects the specified floating-point values as follows: The safety parameter editor expects a maximum of 7 digits in its fractional part for a single-precision floating-point number (also known as float32 value). See the following example 2a. The safety parameter editor expects a maximum of 15 to 17 digits in its fractional part for a double-precision floating-point number (also known as float64 value). When you hover over the field for Value, the tooltip informs you about the type of the floating-point value. The value is either Float32 or Float64. As a consequence: If a specified value cannot be precisely interpreted as a floating-point number, the safety parameter editor informs that there is a incorrect change. In this case, correct the value to the corresponding floating-point number. See the following example 2a and example 2b.

Example 2a: You are changing a floating-point value to the value 3.14151617181920. The field for Value is highlighted with a yellow background color because you need to confirm your change first. After the confirmation, the field is highlight with a red background color and the error message informs about the closed representation. Reason: The value is too long (it cannot be represented according the type of the parameter).

Example 2b: The specified floating-point value value 3.1415166 is also an incorrect value for the safety parameter editor. The reason is that 3.1415166 is represented internally as 3.14151668548583984375 as a floating-point number which is finally rounded to have a 7 digit fraction. Again, the field for Value is highlighted with a yellow background color because you need to confirm your change first as for example 2a. After the confirmation, the field is highlight with a red background color and the error message informs about the closed representation. Reason: The value cannot be represented according to the type of the parameter.

Good to know

To collapse a group, click the icon  which is displayed in front of the group name or click the name of the group itself. Or navigate to the icon  by using the Tab-key and press the Enter-key. Alternative: Collapse all groups at once by clicking Collapse all in the control bar. Or navigate to Collapse all by using the Tab-key and press the Enter-key.  The mark  is displayed before the name of the top group, if this group contains changed parameter values that have not been saved yet.  In addition, the dirty flag * in the tab makes you aware of unsaved changes in the editor. For details on saving, see "Saving safety parameter editor". If the safety parameter editor contains invalid values, it is not possible to save the content. If you revert an already changed value to its initial value (e.g. by entering its initial value into the entry field and confirming the change), the safety parameter editor still considers the parameter as changed.   Use the bulk editing feature, if you want to bulk edit the safety parameters in safety-relevant hardware devices.