Data Sheet

● Number of delay alarm OBs
2; OB 20, 21
● Number of cyclic interrupt OBs
4; OB 32, 33, 34, 35
● Number of process alarm OBs
1; OB 40
● Number of DPV1 alarm OBs
3; OB 55, 56, 57
● Number of isochronous mode OBs
1; OB 61
● Number of startup OBs
1; OB 100
● Number of asynchronous error OBs
5; OB 80, 82, 85, 86, 87
● Number of synchronous error OBs
2; OB 121, 122
Nesting depth
● per priority class
16
● additional within an error OB
4
Counters, timers and their retentivity
S7 counter
● Number
256
Retentivity
— adjustable
Yes
— lower limit
0
— upper limit
255
— preset
Z 0 to Z 7
Counting range
— lower limit
0
— upper limit
999
IEC counter
● present
Yes
● Type
SFB
● Number
Unlimited (limited only by RAM capacity)
S7 times
● Number
256
Retentivity
— adjustable
Yes
— lower limit
0
— upper limit
255
— preset
No retentivity
Time range
— lower limit
10ms
— upper limit
9990s
IEC timer
● present
Yes
● Type
SFB
● Number
Unlimited (limited only by RAM capacity)
Data areas and their retentivity
6ES7315-2AH14-0AB0 Subject to change without notice
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09/13/2019 © Copyright Siemens