Siemens SIMATIC S7-1200

Technical specifications
A.8 CPU 1217C
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
1427
A.8.2
Timers, counters and code blocks supported by CPU 1217C
Table A- 90 Blocks, timers and counters supported by CPU 1217C
Element
Description
Blocks
Type
OB, FB, FC, DB
Size 64 Kbytes
Quantity
Up to 1024 blocks total (OBs + FBs + FCs + DBs)
Address range for FBs, FCs,
and DBs
FB and FC: 1 to 65535 (such as FB 1 to FB 65535)
DB: 1 to 59999
Nesting depth 16 from the program cycle or startup OB
6 from any interrupt event OB
Monitoring
Status of 2 code blocks can be monitored simultaneously
OBs
Program cycle
Multiple
Startup
Multiple
Time-delay interrupts
4 (1 per event)
Cyclic interrupts
4 (1 per event)
Hardware interrupts
50 (1 per event)
Time error interrupts
1
Diagnostic error interrupts
1
Pull or plug of modules
1
Rack or station failure
1
Time of day
Multiple
Status
1
Update
1
Profile
1
MC-Interpolator
1
MC-Servo 1
MC-PreServo
1
MC-PostServo 1
Timers
Type
IEC
Quantity
Limited only by memory size
Storage
Structure in DB, 16 bytes per timer
Counters
Type
IEC
Quantity
Limited only by memory size
Storage Structure in DB, size dependent upon count type
• SInt, USInt: 3 bytes
• Int, UInt: 6 bytes
• DInt, UDInt: 12 bytes