P3: Basic PLC Program for SINUMERIK 840D sl
13.2 Key data of the PLC-CPUs for 840D sl and 840Di sl
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
845
Mode switch for the PLC CPU
On the NCU module, the rotary switch labeled "PLC" is used to set the PLC operating modes.
The switch settings S are listed in the following table:
PI services + +
Tool management + +
Star/delta switchover + +
m:n ++
Safety Integrated -+
Program diagnostics ++
S Meaning Remark
0 RUN-P The PLC program can be changed without activation of the password
1 RUN Only read access operations are possible using a programming device (PG). It
is not possible to make changes to the PLC program until the password has
been set.
2 STOP Processing the PLC program is stopped and all PLC outputs are set to
substitute values.
3 MRES The PLC is switched into the STOP state followed by a PLC general reset
(default data).
Type of control
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