Rockwell-automation 2706-DXX Dataliner Message Display DL5 Series Uživatelský manuál stáhnout pdf (Strana 76)

2706-UM001A-US-P

9-4 Using the Variable Data Feature

Parallel Port Strobe and Data

Bits

The DL5 uses the sixteen data lines (D0 through D15) to input both variable

data and message triggers. Data lines D0 through D13 transfer the fourteen

data bits and data lines D14 and D15 are the two strobe lines.

The strobe lines indicate whether the data on the data lines is a message

number or variable data. There are four possible combinations of the two

strobe lines. The table below lists the four strobe combinations and the

DL5’s interpretation of the strobe commands.

Strobe Commands

Notice that if data line D15 is ON, the DL5 will interpret the data on the

data lines as a message number regardless of the condition of data line D14.

Strobe Command Strobe Line, Data Line D14 Strobe Line, Data Line D15

Ignore Data Lines OFF OFF

Variable Data ON OFF

Message Number OFF ON

Message Number ON ON

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 118 119

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Rockwell-automation 2706-DXX Dataliner Message Display DL5 Series Uživatelský manuál Strana 76