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
2-5
840Di 840D
PBC (programmable block
communication)
Yes Yes
Consistent data to standard
slave via SFC 14, 15
128 128
1) Notice: The inputs/outputs above 4096 are reserved for integrated drives.
2) Subrack 0 is integrated in the NC. Subracks 1 to 3 are available for I/O devices.
I/O expansion
840Di 840D
PLC CPU
MLFB
Integrated PLC 317-2DP
master/slave
6FC5 317-2AJ10-0AB0
Integrated PLC 317-2DP
master/slave
6FC5 317-2AJ10-1AB0
I/O modules PROFIBUS only 24
PROFIBUS DP modules 1 (2) 1
Interfaces (MPI) 1 (0) 1
Note
Number of PROFIBUS slaves
Since the SDB 2000 and other SDBs must be stored by the PLC operating system in the
static RAM, which can also be accessed by the PROFIBUS ASIC, SDBs smaller than 32
Kbytes may be rejected when the configuration is loaded. It cannot be determined whether
the configuration is legal until the SDB container has been loaded to the CPU. As a result,
the values specified in the above tables should only be seen as guide values.
If the configuration is illegal, a general reset request is issued when the SDBs are loaded.
The cause of the configuring error can be found in the diagnostic buffer on completion of the
general reset.
PLC versions
In SW 3.5 and higher on the 840D, version 6 (version code 35.06.03) is installed with
PLC 314 and version 3 (version code 35.03.03) with PLC 315-2DP or higher.
These versions are compatible with the corresponding SIMATIC CPU300.
All modules and software packages approved by SIMATIC for these versions and CPUs are
therefore suitable. Modules that can only be installed in subrack 0 are the exception
(modules FM NC and FM 357 are also exceptions).
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