Technical data of CPU 31x
7.4 CPU 315-2 DP
CPU 31xC and CPU 31x, Technical data
7-14 Manual, Edition 08/2004, A5E00105475-05
Technical data
Data areas and their retentivity
Flag bits 2048 bytes
• Retentive memory
Yes
• Default retentivity
MB0 to MB15
Clock flag bits 8 (1 byte per flag bit)
Data blocks
• Number
1023
(DB 1 to DB 1023)
• Length
16 KB
Local data capacity Max. 1024 bytes per task/510 per block
Blocks
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
16 KB
Nesting depth
• Per priority class
8
• additional within an error OB
4
FBs See the Instruction List
• Number
2048
(FB 0 to FB 2047)
• Length
16 KB
FCs See the Instruction List
• Number
2048
(FC 0 to FC 2047)
• Length
16 KB
Address areas (I/O)
Total I/O address area max. 2048 bytes/2048 bytes
(can be freely addressed)
Distributed Max. 2000
I/O process image 128/128
Digital channels Max. 16384
of those local Max. 1024
Analog channels Max. 1024
of those local Max. 256
Assembly
Racks Max. 4
Modules per rack 8
Number of DP masters
• Integrated
1
• via CP
1
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