Measurement-computing Serial488/4 Uživatelský manuál stáhnout pdf (Strana 79)

Section 4 IEEE 488 Primer

4.8

4.7.2 Listen Address Group (LAG)

There are 31 (0 to 30) listen addresses associated with this group. The 3

most significant bits of the data bus are set to 001 w hile the 5 least

significant bits are the address of the device being told to listen.

4.7.3 Unlisten (UNL)

This command tells all bus devices to U nlisten. The same as

Unaddressed to Listen. ($3F)

4.7.4 Talk Address Group (TAG)

There are 31 (0 to 30) talk addresses associated w ith this group. The 3

most significant bits of the data bus are set to 010 w hile the 5 least

significant bits are the address of the device being told to talk.

4.7.5 Untalk (UNT)

This command tells bus devices to Untalk. The same as Unaddressed to

Talk. ($5F)

4.7.6 Local Lockout (LLO)

Issuing the

LLO

command prevents manual control of the instrument's

functions. ($11)

4.7.7 Device Clear (DCL)

This command causes all bus devices to be initialized to a pre-defined

or power up state. ($14)

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Measurement-computing Serial488/4 Uživatelský manuál Strana 79