Loading Plc Symbols To The Controller - Siemens SINUMERIK 840D sl Commissioning Manual

5.6

Loading PLC symbols to the controller

Requirements
You require the SIMATIC STEP 7 software and the "PLC Symbols Generator" program that is
provided in the toolbox.
For blocks that already have a symbolic name, these symbols cannot be overwritten by other
user-defined designations. Only those symbols are transferred from the blocks to the control
without preassigned symbols.
Generating PLC symbols
To edit PLC blocks via symbolic names, you can generate the symbols of the STEP 7 project
for SINUMERIK Operate and store them on the CompactFlash card on the control.
Procedure:
1. Open the "PLC Symbols Generator" program and navigate to the corresponding PLC
project.
2. To start the generation, first select the required language.
3. Save the "PlcSym.snh" and "PlcSym_xx.snt" files. xx is the language code specified when
creating the file. The generation is then started.
4. Create the following directory on the CompactFlash card and store the generated files
(PlcSym_xx.snt, PlcSym.snh) under the following path: /oem/sinumerik/plc/symbols
This path also applies for SINUMERIK Operate on the PCU 50.
5. After restarting SINUMERIK Operate, the symbol tables are loaded when booting. Select
the "Insert variables" softkey to display the imported symbols in the table of the "NC/PLC
variables".
Note
The notation (upper/lower case) of the file name that the program created is mandatory and
must not be changed.
Transmission log
For the generation and transmission of the symbols, a transmission log is created and stored
under the following path: ../log/symbolimport.log
Example:
...
Error importing PLC symbols: skip vdi on 840d: Symbol number 16956
...
CNC Commissioning: NC, PLC, Drive
Commissioning Manual, 12/2019, A5E48312804B AA
PLC commissioning
5.6 Loading PLC symbols to the controller
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