Siemens SINUMERIK 840D sl Operating Manual page 258

Alarm, error, and system messages
13.4 PLC and NC variables
Changing PLC variables
Changes can only be made to the PLC variables with the appropriate password.
Changes in the states of NC/PLC variables have a major impact on the machine. Incorrect
configuration of the parameters can endanger human life and cause damage to the
machine.
Changing and deleting values
258
DANGER
1. Select the "Diagnostics" operating area.
2. Press the "NC/PLC variab." softkey.
The "NC/PLC variables" window opens.
3. Position the cursor in the "Variable" column and enter the required
variable.
4. Press the <INPUT> key.
The operand is displayed with the value.
5. Press the "Details" softkey.
The "NC/PLC variables: Details" window opens. The information for
"Variable", "Comment" and "Value" are displayed in the full length.
6. Position the cursor in the "Format" field and choose the required
format with <SELECT>.
7. Press the "Display comments" softkey.
The "Comments" column is displayed. You have the option of creating
comments or editing existing comments.
Press the "Display comments" softkey once again to hide the column
again.
8. Press the "Change" softkey if you would like to edit the value.
The "Value" column can be edited.
9. Press the "Insert variable" softkey if you wish to select a variable from
a list of all of the existing variables and insert this.
The "Select variable" window opens.
10. Press the "Filter/search" softkey to restrict the display of variables
(e.g. to mode groups-variables) using the "Filter" selection box and/or
select the desired variable using the "Search" input box.
Operating Manual, 03/2010, 6FC5398-6AP10-4BA0
Universal