Rockwell-automation 1763 MicroLogix 1100 Programmable Controllers User Manual de usuario descargar pdf (Pagina 114)

Publication 1763-UM001D-EN-P - March 2011

112 Using the LCD

The example table below shows how the LCD uses the configuration

information with bit file number 3 (LCD:0.TBF=3).

The bit number displayed on the LCD corresponds to the data address as

illustrated in the table. The protection bit defines whether the data is editable

or read-only. When the protection bit is set (1), the corresponding data address

is considered read-only by the LCD. The “Protected!” message is displayed

whenever a read-only element is active on the LCD. When the protection bit is

clear (0) or the protection bit does not exist, no additional message is displayed

and the data within the corresponding address is editable from the LCD

keypad.

Bit Number Data Address Protection Bit Bit Number Data Address Protection Bit Bit Number Data Address Protection Bit

0 B3:0/0 B3:3/0 16 B3:1/0 B3:4/0 32 B3:2/0 B3:5/0

1 B3:0/1 B3:3/1 17 B3:1/1 B3:4/1 33 B3:2/1 B3:5/1

2 B3:0/2 B3:3/2 18 B3:1/2 B3:4/2 34 B3:2/2 B3:5/2

3 B3:0/3 B3:3/3 19 B3:1/3 B3:4/3 35 B3:2/3 B3:5/3

4 B3:0/4 B3:3/4 20 B3:1/4 B3:4/4 36 B3:2/4 B3:5/4

5 B3:0/5 B3:3/5 21 B3:1/5 B3:4/5 37 B3:2/5 B3:5/5

6 B3:0/6 B3:3/6 22 B3:1/6 B3:4/6 38 B3:2/6 B3:5/6

7 B3:0/7 B3:3/7 23 B3:1/7 B3:4/7 39 B3:2/7 B3:5/7

8 B3:0/8 B3:3/8 24 B3:1/8 B3:4/8 40 B3:2/8 B3:5/8

9 B3:0/9 B3:3/9 25 B3:1/9 B3:4/9 41 B3:2/9 B3:5/9

10 B3:0/10 B3:3/10 26 B3:1/10 B3:4/10 42 B3:2/10 B3:5/10

11 B3:0/11 B3:3/11 27 B3:1/11 B3:4/11 43 B3:2/11 B3:5/11

12 B3:0/12 B3:3/12 28 B3:1/12 B3:4/12 44 B3:2/12 B3:5/12

13 B3:0/13 B3:3/13 29 B3:1/13 B3:4/13 45 B3:2/13 B3:5/13

14 B3:0/14 B3:3/14 30 B3:1/14 B3:4/14 46 B3:2/14 B3:5/14

15 B3:0/15 B3:3/15 31 B3:1/15 B3:4/15 47 B3:2/15 B3:5/15

IMPORTANT

Although the LCD does not allow protected data to

be changed from its keypad, the control program or

other communication devices do have access to this

data. Protection bits only provide LCD write

protection. They do not provide any overwrite

protection to data from ladder logic, HMI, or

programming software. It is the users responsibility

to ensure that data is not inadvertently overwritten.

TIP

• Remaining addresses within the target file can be

used without restrictions (addresses B3:6/0 and

above, in this example).

• The LCD always starts at bit 0 of a data file. It

cannot start at any other address within the file.

1 2 ... 109 110 111 112 113 114 115 116 117 118 119 ... 255 256

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