Справочник Пользователя для Siemens 6ED1050-1AA00-0BE8
LOGO! functions
4.1 Constants and connectors - Co
LOGO!
140
Manual, 04/2011, A5E03556174-01
Message text character set flag M27
The M27 flag selects between the two character sets that LOGO! uses to display message
texts. State 0 corresponds to Character Set 1, and state 1 corresponds to Character Set 2. If
M27=0 (low), only message texts configured for Character Set 1 will display; If M27=1 (high),
only message texts configured for Character Set 2 will display. If you do not include M27 in
the circuit program, message texts display in the character set that you selected from either
the Msg Config menu or from LOGO!Soft Comfort.
Note
The output of the flag always carries the signal of the previous program cycle. This value
The output of the flag always carries the signal of the previous program cycle. This value
does not change within the same program cycle.
Shift register bits
LOGO! provides the shift register bits S1 to S8 (if 0BA6) or S1.1 to S4.8 (if 0BA7), which are
assigned the read–only attribute in the circuit program. The content of shift register bits can
only be modified by means of the "Shift register" (Page 245) special function.
Cursor keys
Up to four cursor keys are available to you, namely C , C , C and C ("C" = "Cursor").
Cursor keys are programmed for the circuit program in the same way as other inputs. You
can set the cursor keys in the corresponding display while the system is in RUN (Page 97) ,
and in an active message text (ESC + Key). Cursor keys can save switches and inputs, and
allow operator control of the circuit program. Cursor key inputs from the LOGO! TD are
identical to cursor key inputs from the LOGO! Base Module.
LOGO! TD function keys
The LOGO! TD has four function keys that you can use in your circuit program. You program
these keys in the same way as other inputs. Like the cursor keys, you can press these keys
when LOGO! is in RUN mode to affect the behavior of the circuit program, and to save
switches and inputs. They are identified as F1, F2, F3, and F4.
Levels
Voltage levels are designated hi and lo. A constant "1" = hi or "0" = lo status at the block can
be set by means of a permanent voltage level or constant value hi or lo.
Open connectors
Unused block connectors can be identified with an x.