Detailed Description 
  2.1 Key PLC CPU data for 810D, 840D and 840Di 
PLC Basic Program Solution Line (P3 sl) 
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0 
2-5 
PLC basic program functions 
 
 
  840Di  810D sl 
Interfaces     
MPI  1  1 
Ethernet 2+1 
Functions of basic program     
Scope:
 
Axes/spindles 
Channels 
Mode groups 
 
See Catalog 
6 
6 
 
31 
10 
10 
Functions:
  
Status/control signals 
M decoders (M00-99) 
G group decoders 
Aux. function distributors 
Aux. function transfer, interrupt-driven 
M decoding acc. to list 
Move axes/spindles from PLC 
Async. subprogram interface 
Error/operating messages 
Transfer MCP and HHU signals 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
Display control handheld unit  +  + 
Read/write NCK variables and GUD  +  + 
PI services  +  + 
Tool management  +  + 
Star/delta switchover  +  + 
m:n 
Safety Integrated 
Program diagnostics 
+ 
 
+ 
+ 
+ 
+ 
 
Mode selector on PLC CPUs for 840D 
On the NCU component, the right-hand twist button labeled "PLC" is used to set the PLC 
operating mode. 
The switch settings are listed in the following table. 
 
Switch setting  Meaning  Remarks 
0  RUN-P   
1  RUN  Cannot load program 
2  STOP   
3  MRES