5.1 Display and operation in S (Switch) mode
The ASCII characters "FP-E-" and the description of the "DT20" are displayed in the upper and lower
sections of the controller screen respectively, using the F180 (SCR) instruction.
The front switches can be used as the input contacts "X30" to "X37." The switch can also be used to
change the display description, and so on depending on the program.
Note: 1. The front switches are allocated as the input contacts "X30" to "X37" and "X38" to "X3F."
"X30" to "X37": The switch can be locked using the program.
"X38" to "X3F": The switch cannot be locked using the program.
Reference: For further information, see "Locking the Switch" in A.2 "I/O
2. Pressing the "MODE" switch for about 2 seconds displays the "LOCK."
In this condition, the input contacts "X30" to "X37" cannot be used, but "X38" to "X3F" can
be used.
3. The input contacts "X30" to "X3F" do not turn ON during the first scanning after the mode is
switched to RUN mode.
5-2
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Allocation."