Consistent Data - Siemens S7-300 Installation Manual

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The following addresses are assigned to the integrated I/O of CPU 314 IFM:
Table 8-2
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20 digital inputs
16 digital outputs
4 analog inputs
1 analog output
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The table below illustrates the points to consider with respect to communication LQ
D '3 PDVWHU V\VWHP if you want to transfer I/O areas with "Total length"
consistency.
Even if they exist in the process image,
consistent data is not automatically updated.
To read and write consistent data, you must
use SFC14 and 15.
You can transfer a maximum of 32 bytes of consistent data.
S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01
Integrate inputs and outputs on the CPU 314 IFM
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124.0 to 126.3
of those are 4 Inputs for
integrated functions:
126.0 to 126.3
124.0 to 125.7
128 to 135
128 to 129
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Optional utilization of Inputs for
integrated functions:
•
Counting
•
Counting A/B
•
Frequency measurement
•
Positioning
•
Interrupt input
See
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–
–
–
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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 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).
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8-7