Siemens Simatic S7-300 CPU 31xC and CPU 31x S7-300 - Manual (Page 125)

Technical data of CPU 31xC
6.4 CPU 313C-2 PtP and CPU 313C-2 DP
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
6-15
Technical data
CPU 313C-2 PtP CPU 313C-2 DP
Data areas and their retentivity CPU 313C-2 PtP CPU 313C-2 DP
Flag bits 256 bytes
• Retentive memory Configurable
• Default retentivity MB0 to MB15
Clock flag bits 8 (1 byte per flag bit)
Data blocks Max. 511
(DB 1 to DB 511)
• Length max. 16 KB
Local data per priority class max. 510 bytes
Blocks CPU 313C-2 PtP CPU 313C-2 DP
Total 1024 (DBs, FCs, FBs)
The maximum number of blocks that can be loaded may be reduced if you are
using another MMC.
OBs see the Instruction List
• Length max. 16 KB
Nesting depth
• Per priority class 8
• additional within an error OB 4
FBs Max. 512
(FB 0 to FB 511)
• Length max. 16 KB
FCs Max. 512
(FC 0 to FC 511)
• Length max. 16 KB
Address areas (I/O) CPU 313C-2 PtP CPU 313C-2 DP
Total I/O address area max. 1024 bytes/1024 bytes
(can be freely addressed)
max. 1024 bytes/1024 bytes
(can be freely addressed)
• Distributed None max. 1008 bytes
I/O process image 128 bytes/128 bytes 128 bytes/128 bytes
Digital channels Max. 1008 Max. 8192
• of those local Max. 992 Max. 992
• Integrated channels 16 DI / 16 DO 16 DI / 16 DO
Analog channels Max. 248 Max. 512
• of those local Max. 248 Max. 248
• Integrated channels None None
Assembly CPU 313C-2 PtP CPU 313C-2 DP
Racks Max. 4
Modules per rack max. 8; max. 7 in rack 3
Number of DP masters
• Integrated No 1
• via CP Max. 1 Max. 1