Selecting The Device Address - HP 9122D Service Manual

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in the Ur4ted States of America and Canada with equipment set

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eithit' 2GO or 240 Vac, ooenltion.

Figu.re 2 - 2. A vaila bIe Power Cords.

Selecting the

Devic~! Addn~ss

Each device in an HP-IB system must be set to a unique device address. The HP 91220/5 contains address

switches located on the rear panel for programming in this address. 5ee the mass storage information of

your controller for aJdressing inf'Jrma tiCin concerning mass storage devices. See Figure 2 -

5

for switch loca-

tions. An HP-IB address of 0 is set at the factory before shipment.

Prior to setting the device address switches, turn the disc drive AC line switch OFF. This is because part of

the seIftest and power-up sequen,;e includes a check to see what the address switch settings are. Each time

power is applied to the disc drive these switch settings are checked, so if you change the switches be sure to

cycle the power switch.

The switches can be set to anyone of eight addresses, from 0 through 7. Refer to Figure 2- 3 when setting

these switches to the desired device address.

2-2