Rockwell-automation 2706-DXX Dataliner Message Display DL5 Series Manual do Utilizador descarregar pdf (Página 55)

2706-UM001A-US-P

Using the Parallel Port 7-5

Using BCD Data Input

The fourteen data lines can also be used to input BCD formatted data. The

BCD numbering system uses a group of four data lines to represent a single

decimal digit. The table below shows the value of each data line. Selecting

the BCD run mode is explained in Chapter 8.

BCD Values of the Data Lines

Control functions of the strobe lines are the same for BCD data input as for

binary data input.

For example, assume the following logic (positive logic) levels appear on

the data lines.

Adding the values of the individual data lines provides the value being

entered, in this example 1,145. Again, D14 is high (voltage present) and

D15 is low (ground level), so this number is interpreted as variable data.

Data Line Value When On

(True)

Data Line Value When On

(True)

D0 1 D8 100

D1 2 D9 200

D2 4 D10 400

D3 8 D11 800

D4 10 D12 1,000

D5 20 D13 2,000

D6 40 D14 Strobe Line

D7 80 D15 Strobe Line

Data Line: D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15

Logic Level: 1010001010001010

Value: 1040004001000001,000 0 0 0

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 118 119

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Rockwell-automation 2706-DXX Dataliner Message Display DL5 Series Manual do Utilizador Página 55