Siemens CPU 31 Series Technical Data Manual page 180

Technical data of CPU 31x
7.4 CPU 315-2 DP
Technical data
Data areas and their retentive address areas
Bit memory
•
•
Clock memory
Data blocks
•
•
Local data capacity
Blocks
Total
OBs
•
Nesting depth
•
•
FBs
•
•
FCs
•
•
Address areas (I/O)
Total I/O address area
Distributed
I/O process image
Digital channels
Of those central
Analog channels
Of those central
Removal
Module rack
Modules per rack
Number of DP masters
•
•
7-14
Retentive address areas
Preset retentive address areas
Number
Size
Size
Per priority class
Additional within an error OB
Number, Max.
Size
Number, Max.
Size
Integrated
Via CP
2048 bytes
Yes
MB0 to MB15
8 (1 memory byte)
1023
(in the 1 to 1023 range of numbers)
16 Kbytes
Max. 1024 bytes per task/510 per block
1024 (DBs, FCs, FBs)
The maximum number of blocks that can be
loaded may be reduced if you are using another
MMC.
See the Instruction List
16 Kbytes
8
4
See the Instruction List
1024
(in the 0 to 2047 range of numbers)
16 Kbytes
See the Instruction List
1024
(in the 0 to 2047 range of numbers)
16 Kbytes
Max. 2048 bytes / 2048 bytes
(can be freely addressed)
Max. 2000
128/128
Max. 16384
Max. 1024
Max. 1024
Max. 256
Max. 4
8
1
4
CPU 31xC and CPU 31x, Technical Data
Manual, 01/2006 Edition, A5E00105475-06