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SIMATIC VPU200/565 Programming Manual
The ABORT (F1) function key terminates the MODIFY operation, discards
all changes which were made, and returns to the Loop Directory display.
The ENTER (F4) function key saves all changes and returns the display to
the Loop Directory. The VPU checks the validity of loop entries before
saving. If an error is detected, the cursor is displayed at the first detected
error. All entries must be complete and correct before the loop will be
entered. See Appendix A for types of error messages.
The remaining function keys are used to move through the Loop
Programming Table. When the first page of the table is shown, pressing the
UP (F2) function key displays the second page of the table. When the second
page is displayed, pressing the DOWN (F3) function key returns the display
to the first page of the table. The arrow and Return keys allow you to move
the cursor from entry to entry in the table. These keys operate in the
following manner:
The Return moves the cursor to the left field in the next line.
The up and down arrow keys move the cursor to the previous or next
line, respectively, in the same field areas.
The right and left arrow keys move the cursor to the right or left fields
on the same line. If no right field exists on a line, the cursor remains in
the same position when the right arrow key is pressed.
As the cursor is moved from entry to entry, function keys are labeled as
needed to input the loop data.
Table 3-1 given on the following pages lists each entry which appears in the
Loop Programming Table and gives the responses which are permitted.
Programming Loops
3-5
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