Siemens 6ED1050-1AA00-0BE8 User Manual

 

LOGO! functions 

 

4.4 Special functions list - SF 

LOGO! 
Manual, 04/2011, A5E03556174-01 

245

 

Let us assume you want to set 'Switch' (On). 
1.  Change to the editing mode: Confirm with OK (the cursor is now positioned on 'Off') 
2.  To change from 'Off' to 'On': Press   or   
3.  Confirm your entries with Press OK 

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4.4.27 

Shift register 

Short description 

You can use the shift register function to read the value of an input and to shift its bits left or 

right. The output value corresponds with the configured shift register bit. The shifting 

direction can be changed at a special input.   

 

Symbol in LOGO! 

Wiring 

Description 

Input In 

Input read at the start of the function. 

Input Trg 

A positive edge (0 to 1 transition) at input Trg 

(Trigger) starts the special function. 1 to 0 transitions 

are irrelevant. 

Input Dir 

The signal at input Dir determines the shifting 

direction for the shift register bits S1 to S8 (if 0BA6) 

or Sx.1 to Sx.8 (if 0BA7). "x" refers to the configured 

shift register byte index 1, 2, 3, or 4. 
Dir = 0: Shift up  
(0BA6: S1 >> S8; 0BA7: Sx.1>>Sx.8) 
Dir = 1: Shift down  
(0BA6: S8 >> S1; 0BA7: Sx.8>>Sx.1) 

Parameter 

Shift register bit that determines the value at output 

Q. 
Possible settings (if 0BA6): 
S1 to S8  
Possible settings (if 0BA7):  
Byte index: 1 to 4  
Q: S1 to S8 
LOGO! 0BA7 provides a maximum of 32 shift register 

bits, with 8 bits per shift register.  
Retentivity:  

/ = No retentivity 

R = The status is retentive.  

4

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Output Q 

The output value corresponds with the configured 

shift register bit.