Siemens S7-300 - Consistent Data

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S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01
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The following addresses are assigned to the integrated I/O of CPU 314 IFM:
Table 8-2 Integrate inputs and outputs on the CPU 314 IFM
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20 digital inputs 124.0 to 126.3
of those are 4 Inputs for
integrated functions:
126.0 to 126.3
Optional utilization of Inputs for
integrated functions:
• Counting
• Counting A/B
• Frequency measurement
• Positioning
• Interrupt input
See
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16 digital outputs 124.0 to 125.7 –
4 analog inputs 128 to 135 –
1 analog output 128 to 129 –
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The table below illustrates the points to consider with respect to communication LQ
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consistency.
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Even if they exist in the process image,
consistent data is not automatically updated.
You can choose whether or not to update
the address area of consistent data in the
process image.
To read and write consistent data, you must
use SFC14 and 15.
To read and write consistent data, you can
also use SFC14 and 15.
If the address area of consistent data is not
in the process image, you must use SFC14
and 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.