Siemens CPU 31 Series Technical Data Manual page 200

Technical data of CPU 31x
7.7 CPU 317-2 PN/DP
Technical Data
IEC Timers
•
•
Data areas and their retentivity
Flag bits
•
•
Clock flag bits
Data blocks
•
•
•
Local data per priority class
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
7-34
Type
Number
Retentive memory
Default retentivity
Number
Size
Non-Retain support (configured retention)
Size
Per priority class
additional within an error OB
Number, Max.
Size
Number, Max.
Size
Configurable
Default
Yes
SFB
Unlimited
(limited only by work memory)
4096 bytes
Configurable
From MB0 to MB15
8 (1 byte per flag bit)
2047
(in the 1 to 2047 range of numbers)
64 KB
Yes
Max. 1024 bytes
2048 (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
64 KB
16
4
See the Instruction List
2048
(in the 0 to 2047 range of numbers)
64 KB
See the Instruction List
2048
(in the 0 to 2047 range of numbers)
64 KB
Max. 8192 bytes / 8192 bytes
(can be freely addressed)
Max. 8192 bytes
2048/2048
256/256
65536/65536
Max. 1024
4096/4096
CPU 31xC and CPU 31x, Technical Data
Manual, 01/2006 Edition, A5E00105475-06