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SIMATIC VPU200/565 Programming Manual
Function 17 Fields Defined. The fields available in the Function 17 menu
are defined as follows:
Type – The default for this field is I, Ignore which tells the VPU to
ignore this memory category. The other options for this field are V,
Verify, or E, Examine.
Memory – The memory category to be verified or examined is listed in
this field.
Status – After verification or examination, the VPU displays in this
field whether the memory type passed or failed the comparison.
Modified Locations – The VPU lists in this field the memory addresses
of ladder logic or the numbers of the discrete elements that fail the
compare. For the Verify function, only the first failure is listed. With
the Examine function, at the fourth error found, the VPU operator is
given the option to continue the search or go to the next memory
category. The Sequencer Scan Time and Ladder Networks categories
are treated differently from the other options. Since there is only one
memory location for the scan time information, a passed or failed
status only is indicated. If the status is failed, a 1 is listed in the
Modified Locations field. When the Ladder Networks are verified, only
the address of the first modified rung is listed in the Modified Locations
field.
The four arrow keys on the VPU are used to move the cursor from field to
field for selection and entry of the type of compare to perform on a
particular memory category. The function keys shown in Figure 7-4 are
listed and described below.
Using Support Functions
7-7
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