Measurement-computing Analyzer488 Manual de usuario descargar pdf (Pagina 103)

Section 4 Serial Controller

4.9

Numeric parameters (those that are given as numbers) are decimal

unless preceded by &H in which case they are considered to be

hexadecimal or by % in which case they are considered to be binary. Thus

100 is decimal 100, &H64 is hexadecimal 64 (decimal 100), %00000100

is binary (decimal 4), &HFF is decimal 255, and OFF is invalid because F

is not a valid decimal digit. The only exception to the rule is the IEEE 488

bus addresses, both primary and secondary, must be specified as two digit

decimal numbers. Hexadecimal bus address are not allowed. When

specifying binary numbers, eight digits must follow the % sign.

Several of the commands require additional or optional parameters

and keywords. These are further described with each command, but

discussion of the more common ones follow. If no optional parameters

are specified with a command that requires them, the command will be

treated as invalid.

4.11.2.1 Bus Addressing

pri-addr

A two digit primary device IEEE 488 bus address

in the range of

sec-addr

An optional two digit secondary IEEE 488 bus

device address in the range of

addr

An IEEE 488 bus address. A numeric primary

address optionally followed by a secondary

address. Thus,

addr

is of the form...

{pri-

addr[sec-addr]}

where pri-addr

is a two digit primary IEEE

488 bus device address from

through

and

sec-addr

is a two digit secondary IEEE 488 bus

device address from

through

. Numeric

addresses must be given as two digit decimal

numbers, e.g.

for address

, and

1601

for

primary address

, secondary address

1 2 ... 98 99 100 101 102 103 104 105 106 107 108 ... 280 281

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Measurement-computing Analyzer488 Manual de usuario Pagina 103

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