Addressing
7.2 User-specific addressing of modules
S7-300, CPU 31xC and CPU 31x: Installation
7-6 Operating Instructions, Edition 08/2004, A5E00105492-05
7.2.4 Addressing the integrated I/Os of CPU 31xC
CPU 312C
Addresses of the integrated I/Os of this CPU:
Table 7-1 Integrated I/Os of CPU 312C
Inputs / outputs Default addresses Remarks
10 digital inputs 124.0 to 125.1
of which 8 Inputs are for
technological functions:
124.0 to 124.7
6 digital outputs 124.0 to 124.5
of which 2 inputs are for
technological functions:
124.0 to 124.1
All digital inputs can be assigned an
interrupt function.
Optional technological functions:
• Counting
• Frequency measurement
• Pulse width modulation
CPU 313C
Addresses of the integrated I/Os of this CPU:
Table 7-2 Integrated I/Os of CPU 313C
Inputs / outputs Default addresses Comments
24 digital inputs 124.0 to 126.7
of which 12 inputs are for
technological functions:
124.0 to 125.0
125.4 to 125.6
16 digital outputs 124.0 to 125.7
of which 3 inputs are for
technological functions:
124.0 to 124.2
4+1 analog inputs 752 to 761
2 analog outputs 752 to 755
All digital inputs can be assigned an
interrupt function.
Optional technological functions:
• Counting
• Frequency measurement
• Pulse width modulation
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