D-5
SIMATIC TD 200 Operator Interface
C79000-G7076-C272-01
Byte 3 of the TD 200 parameter block allows you to enable the Time-of-Day (TOD)
and Force menus, to select either 20- or 40-character display mode, and/or to
enable password protection (before allowing any editing). It also contains bits
which are set when either the UP or DOWN arrow keys are pressed.
(C) Character Set The character set selection allows you to choose the
character set mapping. A zero value provides compatibility with previous
versions of the TD 200. A one allows you to select the character set with bytes
12 and 13 of the parameter block.
(T) TOD Clock and (F) Force The TOD Clock and Force selections allow you
to selectively enable the TOD Clock menu and/or the Force menu. Once either
is enabled, you are allowed to access that function in the TD 200. If the function
is not enabled, it does not appear in the TD 200 Menu mode.
(D) Display Mode The display mode selection allows you to choose whether
display messages are one line (20 characters) or two lines (40 characters).
(P) Edit Password The edit password selection allows you to enable a
four-digit password (using 0000-9999) to authorize an operator to edit variables
embedded in a message. The password itself is stored in bytes 10 and 11 of
the parameter block.
(UA and DA) Up Arrow and Down Arrow The up/down arrow status bits
allow your program additional control of the TD 200 display. The TD 200 sets
these bits in the controller if you press these keys while the TD 200 is in display
mode, assuming there is no more than one message active. If your program
uses these bits, the program must reset these bits after they are used.
Figure D-4 shows the information contained in Byte 3.
TD 200 Parameters and Messa
es
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