SIMATIC S7-1200
Central processing units
CPU 1212C
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Siemens ST 70 · 2011
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Technical specifications (continued)
Memory
Usable memory for user data 25 kbyte 25 kbyte 25 kbyte
Work memory
• integrated 25 kbyte 25 kbyte 25 kbyte
• expandable No No No
Load memory
• integrated 1Mbyte 1Mbyte 1Mbyte
• expandable, max. 24 Mbyte; with SIMATIC memory
card
24 Mbyte; with SIMATIC memory
card
24 Mbyte; with SIMATIC memory
card
Backup
• present Yes; entire project maintenance-
free in the integral EEPROM
Yes; entire project maintenance-
free in the integral EEPROM
Yes; entire project maintenance-
free in the integral EEPROM
• without battery Yes Yes Yes
CPU-blocks
Number of blocks (total) DBs, FCs, FBs, counters and
timers. The maximum number of
addressable blocks ranges from
1 to 65535. There is no restriction,
the entire working memory can be
used
DBs, FCs, FBs, counters and
timers. The maximum number of
addressable blocks ranges from
1 to 65535. There is no restriction,
the entire working memory can be
used
DBs, FCs, FBs, counters and
timers. The maximum number of
addressable blocks ranges from
1 to 65535. There is no restriction,
the entire working memory can be
used
OB
• Number, max. Limited only by RAM for code Limited only by RAM for code Limited only by RAM for code
CPU processing times
for bit operations, min. 0.1 μs; / Operation 0.1 μs; / Operation 0.1 μs; / Operation
for word operations, min. 12 μs; / Operation 12 μs; / Operation 12 μs; / Operation
for floating point arithmetic, min. 18 μs; / Operation 18 μs; / Operation 18 μs; / Operation
Data areas and their retentivity
retentive data area in total
(incl. times, counters, flags), max.
2048byte 2048byte 2048byte
Flag
• Number, max. 4 kbyte; Size of bit memory
address area
4 kbyte; Size of bit memory
address area
4 kbyte; Size of bit memory
address area
Address area
I/O address area
• I/O address area, overall 1024 byte for inputs /
1024 byte for outputs
1024 byte for inputs /
1024 byte for outputs
1024 byte for inputs /
1024 byte for outputs
•Overall 1024byte 1024byte 1024byte
•Outputs
1024byte 1024byte 1024byte
Process image
• Inputs, adjustable 1kbyte 1kbyte 1kbyte
• Outputs, adjustable 1kbyte 1kbyte 1kbyte
Digital channels
• Integrated channels (DI) 8 8 8
• Integrated channels (DO) 6 6 6
Analog channels
• Integrated channels (AI) 2 2 2
• Integrated channels (AO) 0 0 0
6ES7 212-1BD30-0XB0 6ES7 212-1AD30-0XB0 6ES7 212-1HD30-0XB0
© Siemens AG 2011
© Siemens AG 2011
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