Message text character set flag M27

LOGO! functions

4.1 Constants and connectors - Co

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 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.

	LOGO!
140	Manual, 04/2011, A5E03556174-01

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Siemens 6ED1050-1AA00-0BE8 Message text character set flag M27, Shift register bits, Cursor keys

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