Technical data
8.2 CPU 315T-2 DP
Technical data
Timers/counters and their retentive address areas
S7 counters 256
• Retentive address areas
Configurable
• Default
From C0 to C7
• Counting range
0 to 999
IEC Counters Yes
• Type
SFB
• Quantity
Unlimited
(limited only working memory)
S7 timers 256
• Retentive address areas
Configurable
• Default
Not retentive
• Timer range
10 ms to 9990 s
IEC timers Yes
• Type
SFB
• Quantity
Unlimited
(limited only by working memory)
Data areas and their retentive address areas
Flag 2048 bytes
• Retentive address areas
Configurable
• Preset retentive address areas
MB0 to MB15
Clock flags 8 (1 flag byte)
Data blocks
• Quantity
1023
(DB 1 to DB 1023)
• Size
16 KB
• Non-retain support (configurable retentive
address areas)
Yes
Local data per priority class Max. 1024 bytes
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
• Size
16 KB
Nesting depth
• Per priority class
8
• Additional within an error OB
4
FBs See the Instruction List
• Quantity
2048
(FB 0 to FB 2047)
• Size
16 KB
S7-300 CPU Data: CPU 315T-2 DP
8-4 Manual, 12/2005, A5E00427933-02