Siemens SIMATIC S5 Manual page 178

M-function:
The M-function is output at the beginning of the statement. The M-function MOO means
"programmed halt", the M-function M02 means program end. After M02, no further state-
ments can be appended. After entering M02, the text "program end" is displayed before
this input field and the text "program halt" is displayed after entering MOO.
Significance of the function keys
With this function key you can display the next statement if the machining program is
longer than one statement and the last statement is not currently displayed.
<F2>:
Analogous to <Fl >, you can page back one statement.
<F3>: With this key you can switch over to text representation.
<F4>: This function key inserts a new statement before the statement currently displayed.
<F5>: This function key deletes the displayed statement.
<F6>: If the machining program is syntactically correct, you save the program on the pre-
viously selected device under the specified DB number with this key. If the program al-
ready exists on this device under this DB number,
overwrite the data block.
<F7>: With the HELP key you can select the alternatives for the fields "statement type" and "G
function",
If you press the EXIT key you exit the input function without saving the data.
you
will be asked whether or not to
Input
5-41