553BTechnical specifications
A.2 CPU 1211C
S7-1200 Programmable controller
664
System Manual, 11/2011, A5E02486680-05
Table A- 9
CPU features
Technical data
Description
Work
25 Kbytes
Load
1 Mbytes
User memory
1
Retentive
2 Kbytes
On-board digital I/O
6 inputs/4 outputs
On-board analog I/O
2 inputs
Process image size
1024 bytes of inputs (I) /1024 bytes of outputs (Q)
Bit memory (M)
4096 bytes
Temporary (local) memory
16 Kbytes for startup and program cycle (including associated FBs and
FCs)
4 Kbytes for standard interrupt events including FBs and FCs
4 Kbytes for error interrupt events including FBs and FCs
Signal modules expansion
none
Signal board expansion
1 SB max.
Communication module expansion
3 CMs max.
High-speed counters
3 total
Single phase: 3 at 100 kHz
Quadrature phase: 3 at 80 kHz
Pulse outputs
2
2
Pulse catch inputs
6
Time delay / cyclic interrupts
4 total with 1 ms resolution
Edge interrupts
6 rising and 6 falling (10 and 10 with optional signal board)
Memory card
SIMATIC Memory Card (optional)
Real time clock accuracy
+/- 60 seconds/month
Real time clock retention time
10 days typ./6 days min. at 40°C (maintenance-free Super Capacitor)
1
The size of the user program, data, and configuration is limited by the available load memory and work memory in the
CPU. There is no specific limit to the number of OB, FC, FB and DB blocks supported or to the size of a particular block;
the only limit is due to overall memory size.
2
For CPU models with relay outputs, you must install a digital signal board (SB) to use the pulse outputs.
Table A- 10 Performance
Type of instruction
Execution speed
Boolean
0.1 μs/instruction
Move Word
12 μs/instruction
Real math
18 μs/instruction
