Siemens SINUMERIK 840D Operating Manual page 571

Note
Logical AND (serial contact) and logical OR (parallel contact) are not possible.
The bit combinations comprise one or several logical operations and the assignment to an
output / bit memory.
If the cursor is moved further to the left with the arrow key, the type of assignment or a logic
operation can be selected. A further logic operation cannot be placed to the right of an
assignment. A network must always be terminated with an assignment.
References
For further information about PLC programming, please refer to:
Function Manual, Basic Functions, Basic PLC Program SINUMERIK 828D (P3-828D)
Procedure
Milling
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
1. An interrupt routine has been selected.
2. Press the "Edit" softkey.
3. Position the cursor on a network.
4. Press the "Insert network" softkey.
- OR -
Press the <INSERT> key.
A new, empty network is inserted behind the network in which the
cursor is positioned.
5. Position the cursor on the desired element below the network title and
press the "Insert operation" softkey.
The "Insert Operation" window appears.
6. Select the desired bit operation (NC contact or NO contact) or
assignment and press the "OK" softkey.
7. Press the "Insert operand" softkey.
8. Enter the logic operation or the command and press the <INPUT> key
to complete the entry.
Ladder Viewer and Ladder add-on (828D only)
19.12 Inserting and editing networks
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