Measurement-computing Digital232 Uživatelský manuál stáhnout pdf (Strana 31)

Section 3 Command Descriptions

3.9

Data received for output to the digital ports must be contained within a

prefix (

) and a suffix (

). If the amount of data sent is less than the number of

bits programmed as outputs, the least-significant bits will contain the data sent

and the most-significant bits will be cleared to logic zero. If the data sent is

greater than the number of bits programmed for output or selected by the

command, the

Digital232

will generate a conflict error and ignore the entire

command string. The

Data Strobe

output is pulse for approximately 50

microseconds after new data is output on the selected port(s).

Example:

select ASCII mode

read data from the

Digital232

display shows 4>6;

D1??2Z

send 1??2 to the

Digital232

read data from the

Digital232

display shows 1??2

F2 Format - ASCII Binary

In the

format, the each data bit is described with an ASCII 0 or 1. Each

byte is formatted in two 4-bit multiples separated by semicolons.

F2 String Decimal

Equiv F2 String Decimal Equiv

0000;0000 0 0000;1001 9

0000;0001 1 0000;1010 10

0000;0010 2 0000;1011 11

0000;0011 3 0000;1100 12

0000;0100 4 0000;1101 13

0000;0101 5 0000;1110 14

0000;0110 6 0000;1111 15

0000;0111 7 1000;0001 129

0000;1000 8 1111;1111 255

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 58 59

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Measurement-computing Digital232 Uživatelský manuál Strana 31