Siemens SIMATIC S7-1200 Manual page 17

Table 1- 2 Blocks, timers, and counters supported by S7-1200
Element
Blocks Type
Size
Quantity
Nesting depth
Monitoring
OBs Program cycle
Startup
Time-delay interrupts
Cyclic interrupts
Hardware interrupts
Time error interrupts
Diagnostic error interrupts
Pull or plug of modules
Rack or station failure
Time of day
Status
Update
Profile
Timers Type
Quantity
Storage
Counters Type
Quantity
Storage
Easy Book
Manual, 01/2015, A5E02486774-AG
Introducing the powerful and flexible S7-1200
Description
OB, FB, FC, DB
50 Kbytes (CPU 1211C)
75 Kbytes (CPU 1212C)
100 Kbytes (CPU 1214C)
125 Kbytes (CPU 1215C)
150 Kbytes (CPU 1217C)
Up to 1024 blocks total (OBs + FBs + FCs + DBs)
16 from the program cycle or startup OB;
6 from any interrupt event OB
Status of 2 code blocks can be monitored simultaneously
Multiple
Multiple
4 (1 per event)
4 (1 per event)
50 (1 per event)
1
1
1
1
Multiple
1
1
1
IEC
Limited only by memory size
Structure in DB, 16 bytes per timer
IEC
Limited only by memory size
Structure in DB, size dependent upon count type
SInt, USInt: 3 bytes
•
Int, UInt: 6 bytes
•
DInt, UDInt: 12 bytes
•
1.1 Introducing the S7-1200 PLC
17