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© Siemens AG 2006 All Rights Reserved
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
PLC Description
7.1 PLC start-up
The PLC in the 840D is compatible with the SIMATIC Step7 AS314.
The basic model has 64 KB of memory, which can be upgraded with another
32 KB to make a total of 96 KB (option).
The PLC program is divided into the basic program and the 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 and
user program
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