Siemens SIMATIC S7-300 CPU Data: CPU 315-T-2 DP User Manual

Information for the Changeover to the Technology CPU
9.2 Changed behavior of certain SFCs
SFC 20 "BLKMOV"
In the past, this SFC could be used with CPUs 312 IFM to 318-2 DP to copy data from a non
runtime-related DB.
SFC 20 no longer has this functionality with the
Technology CPU SFC 83 "READ_DBL" must
now be used instead.
SFC 54 "RD_DPARM"
This SFC is no longer available on the Technology CPU. Use SFC 102 "RD_DPARA"
instead, which works asynchronously.
SFCs that may return other results
You can ignore the following points if you only use logical addressing in your user program.
When using address conversion in your user program (SFC 5 "GADR_LGC",
SFC 49 "LGC_GADR"), you must check the assignment of the slot and logical start address
for your DP slaves.
• In the past, the diagnostic address of a DP slave was assigned to the slave's virtual slot
2. Since DPV1 was standardized, this diagnostic address has been assigned to virtual
slot 0 (station proxy) for the
Technology CPU
• If the slave has modeled a separate slot for the interface module (e.g.
Technology CPU
as an intelligent slave or IM 153), then its address is assigned to slot 2.
Activating / deactivating DP slaves via SFC 12...
With the Technology CPU, slaves that were deactivated via SFC 12 are no longer
automatically activated at the RUN to STOP transition. Now they are not activated until they
are restarted (STOP to RUN transition).
S7-300 CPU Data: CPU 315T-2 DP
Manual, 12/2005, A5E00427933-02
9-3

Siemens SIMATIC S7-300 CPU Data: CPU 315-T-2 DP Specifications

General

Programming Language	STEP 7
Power Supply	24 V DC
Number of DP masters	1
Processable Technology objects	Yes
Number of counters	256
Number of timers	256
S7 communication	Yes
Number of connections for S7 communication, max.	16
PG/OP communication	Yes
Global data communication	Yes
Integrated DP interface	Yes
Integrated PROFINET interface	No
SIMATIC Computing Platform	No
Operating Temperature	0 to 60 °C
Integrated Interfaces	MPI, DP
Communication	PROFIBUS DP
Cycle Time	0.1 ms
Engineering with	STEP 7
Backup available	Yes
Transmission rate, max.	12 Mbit/s