Detailed description 
  2.1 Key PLC CPU data for 810D, 840D and 840Di 
Power Line Basic PLC Program (P3) 
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0 
2-7 
810 D, 840D 
The tables below show the key data of the OPI interface and the PLC basic program 
functionality with reference to SINUMERIK 810D, 840D and 840Di: 
OPI interface 
 
  840Di   810D  840D 
Number  N/A  N/A  1 
 
PLC basic program functions 
 
  840Di  810D  840D 
Axes/spindles 
Channels 
Mode groups 
1)
 
1)
 
1)
 
5 
2 
1 
31 
10 
10 
Status/control signals 
M decoders (M00-99) 
G group decoders 
Aux. function distributors 
Interrupt-driven output of auxiliary functions  
Move axes/spindles from PLC 
Async. subprogram interface 
Error/operating messages 
MCP and handheld unit signals via NCK 
+ 
+ 
+ 
+ 
+ 
+ 
- 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
- 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
- 
+ 
+ 
Reading/writing of NC variables  +  +  + 
PI services  +  +  + 
Tool management  +  +  + 
Star/delta switchover  +  +  + 
Display control handheld unit  +  +  + 
1)
 Depends on chosen system software package