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 Siemens AG 2000 All Rights Reserved
SINUMERIK 840D Installation and Start-Up Guide (IAD) – 04.00 Edition
PLC Start-Up
7.1 PLC start-up
The PLC in the 840D is compatible with the SIMATIC S7-300 CPU 314. The
basic model has a memory configuration of 64 KB that can be extended by
32 KB to a total of 96 KB (option).
The PLC program is subdivided into a basic program and user program. The
entry points for the user program are marked in OBs 1, 40 and 100 of the basic
program.
PLC module
Basic program,
user program
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