Siemens Sitrans Manual De Usuario

Page 38

SITRANS LC 500 – INSTRUCTION MANUAL

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The rotary switch gives you access first to the menu level and then to the menu item. 

The rotary switch has a small slot where the current position can 
be read. The positions are read clockwise, and in increasing order: 
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F. The position wraps from F 
to 0.

The switch can be turned in either direction. When it is turned to a 
new position, the LCD displays the new menu selection for 1 
second, followed by the data for that position. 

Certain menu selections return more than one piece of information 
per item: in that case the display alternates between the two 
values, for example, PV Value / Fault status.

The push-buttons allow you to change the value of a menu item. Use the RED (+) button to 
adjust a value up; the BLUE (–) button to adjust a value down; or press both 
simultaneously for special applications. For a table showing the combinations of rotary 
switch positions and button presses used to carry out different functions, see page 41.

1.

First select Menu LEVEL 0 or Menu LEVEL 1. 

2.

Turn the rotary switch to the number of the desired item.

1.

Select a menu item.

2.

Press the RED (+) or BLUE (–) push button to adjust the value up or down: 

acceptance is indicated when the left-most colon on the LCD appears. (You have to 
press longer than the debounce time to have the action accepted: the debounce 
time varies according to the menu item selected.)

•

For a detailed description of each menu item, see Appendix A, page 54: the 
functions of each menu item are illustrated in application examples on page 93 
to 94. 

•

Change over from Menu LEVEL 0 to Menu LEVEL 1 is only possible at position 0, 
from menu item 00 to 10 or vice-versa. (See page 42 for detailed instructions.)

•

The push buttons are preset with a delay called the debounce time.

•

Keeping one or both buttons pressed continuously will trigger an auto-repeat in 
some menus.