Siemens SIMATIC VPU200/560 Programming Manual page 92

SIMATIC VPU200/560 Programming Manual
Pressing the DEBUG function key displays the following function keys:
As shown, some function keys perform two operations by switching between
two complementary modes. Depending on how these are chosen, other
function keys will be enabled or disabled. The following list describes the
function keys shown above and the manner in which they are accessed:
This function key is only available while the rungs of a
UP
F2
program are being displayed. It will display the next rung
of the program.
This function key is also only available while the rungs of a
DOWN
F3
program are being displayed. It will display the previous
rung of the program.
CHART/LADDER
F4
the rungs or the status chart for a program will be
displayed. If "CHART" is displayed, pressing the function
key will cause the rungs to be replaced by the chart. This
will also disable the UP and DOWN function keys.
"CHART" will change to "LADDER", which indicates that
pressing the key will return the rungs of the program to
the screen and re-enable the UP and DOWN function keys.
(STatus ON or STatus OFF.) This function key
ST.ON/ST.OFF
F5
allows you to choose whether the status of the entries in the
chart or the elements in ladder rungs will be shown on the
screen. If "ST.ON" is displayed pressing the function key
will show the status of the chart or the ladder rung
elements. ST.ON will change to "ST.OFF". which indicates
that pressing the function key will turn the status off again.
This function key allows you to choose whether
Entering Ladder Programs 8-23