Detailed description   
2.1 Key PLC CPU data for 810D, 840D and 840Di 
  Power Line Basic PLC Program (P3) 
2-2  Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0 
  810D / 840D  810D / 840D  810D / 840D 
Inputs/outputs 1) 
(addressing) 
- digital 
- analog 
Subrack 0 is not available for 
I/O devices: 
from I/O byte 32 onwards 
from PI/PO byte 384 
onwards 
Through optional configuring 
of I/O devices: 
from I/O byte 0 onwards 
from PI/PO byte 272 
onwards 
Through optional configuring 
of I/O devices: 
from I/O byte 0 onwards 
from PI/PO byte 272 
onwards 
Processing time 
 - Bit commands (I/O) 
 - Word commands 
 
0.3 ms/kA 
1-4 ms/kA 
 
0.3 ms/kA 
1-4 ms/kA 
 
0.3 ms/kA 
1-4 ms/kA 
PDIAG (Alarm S,SQ)  no  no  yes 
PROFIBUS  N/A  Master  Master/Slave 
Number of PROFIBUS 
slaves 
  Min. 16, max. 64 
SDB 2000 ≤ 8 KB 
Min. 16, max. 64 
SDB 2000 ≤ 32 KB 
PBC (programmable block 
communication) 
no  no  yes 
Consistent data to standard 
slave via SFC 14, 15 
N/A  26  26 
1) Subrack 0 is integrated in the NC. Subracks 1 to 3 are available for I/O devices. 
 
I/O expansion 
 
  810D / 840D  810D / 840D  810D / 840D 
PLC CPU 
 
 MLFB 
Integrated PLC 
CPU314 
Integrated PLC 
CPU315-2DP 
6ES7 315-2AF00-0AB0  
Integrated PLC 
CPU315-2DP master/slave 
6ES7 315-2AF01-0AB0  
I/O modules  24  24  24 
PROFIBUS DP modules  N/A  yes  yes 
Interfaces (MPI)  1  1  1 
Types of control: 840Di, 810D and 840D 
Key CPU data 
 
  840Di  810D  840D 
PLC CPU 
 
 MLFB 
Integrated PLC 315-2DP 
master/slave 
6ES7 315-2AF03-0AB0 
Integrated PLC 315-2DP 
master/slave 
6ES7 315-2AF03-0AB0 
Integrated PLC 314C-2DP 
master/slave 
6FC5 314-6CF00-0AB0 
Memory for user  
and basic program 
64, 96, 128, 160, 192, 224, 
256 KB 
64, 96, 128, 160, 192, 224, 
288 KB 
96, 160, 224, 352, 416, 480 
KB  
(dependent on option) 
Data block memory  Like user memory  Like user memory  Up to 96 KB 
Memory submodule  no  no  no 
Bit memories  4096  4096  4096 
Timers  128  128  256 
Counters  64  64  256 
Clock memories  8  8  8