Measurement-computing Micro 488/EX rev.2.1 Bedienungsanleitung PDF herunterladen (Seite 190)

Section 8 IEEE 488 Primer

8.8

8.7.2 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

while the 5 least

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

8.7.3 Unlisten (UNL)

This command tells all bus devices to Unlisten. The same as

Unaddressed to Listen. (

&H3F

)

8.7.4 Talk Address Group (TAG)

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

most significant bits of the data bus are set to

010

while the 5 least

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

8.7.5 Untalk (UNT)

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

Talk. (

&H5F

)

8.7.6 Local Lockout (LLO)

Issuing the LLO command prevents manual control of the instrument's

functions. (

&H11

)

8.7.7 Device Clear (DCL)

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

or power up state. (

&H14

)

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Measurement-computing Micro 488/EX rev.2.1 Bedienungsanleitung Seite 190