Rockwell Automation 2706-DXX Dataliner Message Display DL5 Series - Manual (Page 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: 1 0 1 0 0 0 1 0 1 0 0 0 1 0 1 0
Value: 1 0 4 0 0 0 40 0 100 0 0 0 1,000 0 0 0