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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
8-8 A5E00105492-03
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The integrated inputs and outputs of these CPUs have the following addresses:
Table 8-4 Integrated inputs and outputs on the CPU 314C-2 PtP/DP
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24 digital inputs 124.0 to 126.7
of those are 16 Inputs for
technological functions:
124.0 to 125.7
16 digital outputs 124.0 to 125.7
of those are 4 Inputs for
technological functions:
124.0 to 124.3
4 +1 analog inputs 752 to 761
2 Analog outputs 752 to 755
All digital inputs can be programmed
as interrupt input.
Optional technological functions:
• Counting
• Frequency measurement
• Pulse width modulation
• Positioning
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You cannot influence outputs with transfer instructions if they are assigned to
technological functions.
I/O not configured for technological functions can be used as standard I/O.
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The table below illustrates the points to consider with respect to communication
LQD'3PDVWHUV\VWHPif you want to transfer I/O areas with "Total length"
consistency.
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The address area of consistent data in the process image is automatically updated.
To read and write consistent data, you can also use SFC 14 and SFC 15.
If the address area of consistent data is not in the process image, you must use SFC 14
and SFC 15 to read and write consistent data.
Direct access to consistent areas is also possible (e.g. L PEW or T PAW).
You can transfer a maximum of 32 bytes of consistent data.
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