Personal Computer User Manual

Technical data of CPU 31x
7.7 CPU 317-2 PN/DP
CPU 31xC and CPU 31x, Technical data
7-34 Manual, Edition 08/2004, A5E00105475-05
Technical data
IEC Timers Yes
Type
SFB
Number
Unlimited
(limited only by RAM size)
Data areas and their retentivity
Flag bits 4096 bytes
Retentive memory
Configurable
Default retentivity
From MB0 to MB15
Clock flag bits 8 (1 byte per flag bit)
Data blocks
Number
2047
(DB 1 to DB 2047)
Length
64 KB
Non-Retain support (configured retention)
Yes
Local data per priority class max. 1024 bytes
Blocks
Total 2048 (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
64 KB
Nesting depth
Per priority class
16
additional within an error OB
4
FBs See the Instruction List
Number
2048
(FB 0 to FB 2047)
Length
64 KB
FCs See the Instruction List
Number
2048
(FC 0 to FC 2047)
Length
64 KB
Address areas (I/O)
Total I/O address area max. 8192 bytes/8192 bytes
(can be freely addressed)
Distributed max. 8192 bytes
I/O process image
Configurable
2048/2048
Default
256/256
Digital channels 65536/65536
of those local Max. 1024