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Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
PLC Start-Up
The PLC integrated on the MCI board of the SINUMERIK 840Di is compatible
with the SIMATIC S7-PLC: AS315-2 DP.
8.1
Start-up prerequisites
Start-up of the PLC differs, depending on whether start-up has already been
carried out and on whether the PLC program is to be loaded as an S7 project
using the SIMATIC Manager STEP7 or as a series machine start-up file.
In order to start up the PLC, generally, the following prerequisites have to be
fulfilled:
1. SINUMERIK 840Di is turned on and booted
2. NC in cyclic mode
3. PLC is in the RUN condition
4. The PLC program to be loaded is available either as an S7 project or as a
series machine start-up file.
8.1.1
Commissioning
When commissioning the PLC, first a general reset of the PLC has to be carried
out after the SINUMERIK 840Di has been turned on and booted.
In order to obtain a defined initial state of the whole system (NC and PLC), it is
recommended also to delete the NC data when commissioning the PLC.
General reset brings the PLC to a defined initial state by deleting and initializing
all system and user data.
After a request to delete NC data, all user data (zero offsets, tool offsets, etc.)
are deleted and the system data (machine data) are reinitialized with the next
ramp-up of the NC.
PLC module
General PLC reset
Deleting NC data
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