National Instruments GPIB-SCSI-A User manual

October 2003

323734A-01

INSTALLATION GUIDE

Installing Your GPIB-SCSI-A

and NI-488.2 for Solaris

This document describes how to configure and connect the GPIB-SCSI-A to

your Sun SPARC system and how to install NI-488.2 for Solaris. The NI-488.2

software included in this kit is intended for use with Sun SPARC systems running

Solaris 2.6 or later. Other documentation, including the software reference

manual, is available on your NI-488.2 software for Solaris CD in the

\documentation folder.

Before you install your GPIB controller, consult the manual that came with your

workstation for specific instructions and warnings. You must have superuser

privileges to install the hardware and software.

™

Installing Your GPIB-SCSI-A and NI-488.2 for Solaris 2 ni.com

Figure 1. GPIB-SCSI-A Rear Panel

Configuring the Hardware

The hardware configurations of the SCSI ID (Target ID) and the GPIB primary

address must match the software configuration in the system configuration files

and the NI-488.2 software.

The GPIB-SCSI-A is shipped from the factory with a 100–120 V or a 220–240 V

power supply. Before you use the GPIB-SCSI-A, verify that the voltage on the

power supply matches the voltage that is supplied in your area.

Caution Operating the GPIB-SCSI-A at any voltage other than the one

specified on the bottom of the unit could damage the unit. Replacement

fuses must be the proper type and rating, which are 100 to 120 VAC,

200 mA UL/CSA approved, or 220 to 240 VAC, 125 mA IEC approved.

The GPIB-SCSI-A is shipped from the factory configured to operate in SCSI (S)

mode. Optional parity checking on the SCSI port is disabled. The SCSI ID that the

GPIB-SCSI-A responds to is set at 5, and the primary GPIB address is set at 0.

Additionally, the GPIB-SCSI-A kit is shipped from the factory with a SCSI

SW1 SW2

OFF

12345678

9120

CTS 206-8

12345678

9120

CTS 206-8

GPIB

SCSI

terminating resistor installed. Depending on how you connect the GPIB-SCSI-A

to your system, you may want to remove the terminating resistor.

Note The only parameters available for configuration with this kit are

the SCSI ID (Target ID) and the GPIB address. Do not change any other

switch settings from the factory default settings.

The factory default setting of the GPIB-SCSI-A Target ID is 5. To confirm that a

Target ID of 5 is available in your system, print out the startup messages from the

last time you booted with the following command:

dmesg

Among the startup messages are the devices found on the SCSI bus and their

respective Target ID numbers. If a Target ID of 5 is not available in your system,

select an unused Target ID (a number between 0 and 7) and set the appropriate

switch to that Target ID number (refer to the Configuration Switch Settings for

SW1section). Typically,Targets 1 and 3 are used bythe internal disks, Target 4 is

used by a tape drive (if you have a tape drive), and Target 0 is used by an external

disk drive. Target 7 is always used by the Sun SPARC system central processing

unit.

Configuration Switch Settings for SW1

The DIP switch at location SW1 on the rear panel in Figure 1 is used to configure

the power-on primary GPIB address and SCSI ID of the GPIB-SCSI-A. Figure 2

shows the factory default settings.

Installing Your GPIB-SCSI-A and NI-488.2 for Solaris 4 ni.com

Figure 2. SW1 Default Mode Switch Settings

Switches 1 through 3 are used to configure the SCSI ID. Switch 1 is the most

significant bit, and Switch 3 is the least significant bit. For example, if Switches 1

through 3 are set to OFF, ON, ON, the SCSI ID is 3.

Switches 4 through 8 are used to configure the power-on primary GPIB address.

Switch 4 is the most significant bit, and Switch 8 is the least significant bit. For

example, if Switches 4 through 8 are set to OFF, OFF, OFF, ON, OFF, a primary

address of 2 is indicated. The largest primary address that can be set is 30.

The default settings of Switches 1 through 3 are ON, OFF, ON, respectively, to

select the SCSI ID of 5. Switches 4 through 8 are OFF, indicating that the GPIB

primary address of the GPIB-SCSI-A is 0.

Configuration Switch Settings for SW2

The DIP switch at location SW2 on the rear panel in Figure 3 is used to configure

the mode of operation for the GPIB-SCSI-A. These switch settings should not be

changed for use with the Sun SPARC system. Figure 3 shows the factory default

settings. Make sure that these switches are set as shown in Figure 3. If they are not,

set these switches as indicated.

SW1

12345678

9120

CTS 206-8

Figure 3. SW2 Default Mode Switch Settings

Table 1 shows the factory default configurations of the eight switches for SW2.

Table 1. Factory Default Configurations for SW2

Switch Position Indication

1–3 OFF Reserved and should remain OFF

4ON Double buffering is enabled

5OFF GPIB-SCSI-A completes all data requests to the

count specified

6ON GPIB-SCSI-A buffers data during data transfer

commands

7ON GPIB-SCSI-A neither notices nor reports SCSI

parity errors

8OFF Operating in S (SCSI) mode

SW2

12345678

9120

CTS 206-8

Installing Your GPIB-SCSI-A and NI-488.2 for Solaris 6 ni.com

Connecting the Hardware

The following are general instructions for connecting the GPIB-SCSI-A to the

Sun SPARC system. Consult the chapter on installing external drives in the

installation guide that came with your Sun SPARC system for specific instructions

and warnings.

There are two methods for connecting the GPIB-SCSI-A to the Sun SPARC

system. One method is connecting the GPIB-SCSI-A directly to the Sun SPARC

system unit by using a cable with the proper connectors at each end. The other

method is daisy-chaining. Daisy-chaining is a means of connecting a number

of SCSI devices to a host; thereby, a single port on the host can serve a variable

number of devices. Daisy-chaining is the suggested method for connecting the

GPIB-SCSI-A to the Sun SPARC system.

Whether you are using a direct connection or daisy-chaining, there are four basic

steps to connecting the GPIB-SCSI-A.

1. Shut down your system and power off your computer.

2. Connect the cables.

3. Switch on your GPIB-SCSI-A.

4. Power on your system.

Step 1. Shut Down the System

Complete the following steps to shut down your system:

1. Enter the shutdown command and power off your computer. (You need

superuser privilege to do a shutdown.)

2. Unplug the power cord from the power outlet.

Step 2. Connect the Cables

Caution Never connect or disconnect SCSI cables when any device

(computer, tape drive, GPIB-SCSI-A, and so on) is powered on. Doing

so can cause fuses to blow inside the GPIB-SCSI-A and inside other

SCSI devices that supply termination power (TERMPWR) to the

SCSI bus.

Complete the following steps to connect the cables:

1. Connect the SCSI cable to the GPIB-SCSI-A and fasten it securely. Connect

the other end to your SCSI system. Be sure to use only shielded SCSI cables.

Total cable length in your SCSI system should be less than 6 m, and

terminating resistors should be installed on both ends, as described in the

Using SCSI Terminating Resistors section.

2. Connect the GPIB cable to the GPIB-SCSI-A and tighten the thumbscrews on

the connector. Connect the other end to your GPIB system. Be sure to use only

shielded GPIB cables. Total cable length in your GPIB system should be less

than 20 m, with a maximum separation of 4 m between any two devices. You

should have no more than 15 devices in a GPIB system, and at least two-thirds

of those devices must be powered on.

3. Plug the power cord into an AC outlet of the correct voltage.

Installing Your GPIB-SCSI-A and NI-488.2 for Solaris 8 ni.com

Using SCSI Terminating Resistors

Because of its high-speed capabilities, the SCSI bus is sensitive to the electrical

characteristics of the SCSI cabling. When a signal is sent through the SCSI bus,

it bounces back and creates echoes along the cabling. Any device in the middle

of the daisy-chained SCSI bus receives these signal echoes. You should use

terminating resistor packs to prevent echoes and ensure proper termination of a

signal. Read the documentation for each device in your system to find out what

kind of termination it provides.

If your GPIB-SCSI-A is located at the end of an SCSI bus, you can prevent echoes

by leaving the terminating resistor pack installed on one of the ports on the rear

panel of the GPIB-SCSI-A. Also, ensure that the device at the other end of the

SCSI bus (for example, the SCSI host in Figure 4) has a terminating resistor

installed. Remove the terminating resistor packs on all devices except for the one

at each end because SCSI signals are not reliably passed along the SCSI bus after

they reach a device with a terminator.

Caution Never connect more than two sets of terminating resistors on an

SCSI bus because more than two sets might overload the signals and

generate errors.

Figure 4 shows where to install terminating resistors if the GPIB-SCSI-A is

located at the end of a system.

Figure 4. Location of Terminating Resistors for GPIB-SCSI-A at End of SCSI Bus

If your GPIB-SCSI-A is not located at the end of the SCSI bus, remove

the terminating resistor pack from the rear panel of the GPIB-SCSI-A. Also

ensure that all other devices in the middle of the bus (for example, the SCSI disk

drive in Figure 4) do not have terminating resistors installed. The devices at each

end of the SCSI bus should have terminating resistors installed.

1 To GPIB Devices

2 Terminating Resistors

3 GPIB-SCSI-A

4 SCSI Tape Drive

5 SCSI Disk Drive

6SCSIHost

POWER READY TALK LISTEN SEND RECEIVE

GPIB-SCSI-A

IEEE-488 SCSI CONTROLLER

Installing Your GPIB-SCSI-A and NI-488.2 for Solaris 10 ni.com

Step 3. Switch On Your GPIB-SCSI-A

Switch on your GPIB-SCSI-A by using the rocker switch on the rear panel. The

POWER LED should come on immediately and the READY indicator on the

front panel should come on after the GPIB-SCSI-A has passed its power-on

self-test, indicating that the unit is ready for operation.

If the READY indicator does not come on within 10 seconds after the unit is

powered on, recheck all connections and switch settings and retry the power-on

sequence. If the READY light still fails to come on, contact National Instruments.

Step 4. Power On Your System

Complete the following steps to power on your system:

1. Plug the power cords of the Sun SPARC system and any other SCSI

equipment into a power outlet.

2. Power on all devices.

3. Power on your system.

Installing NI-488.2

Complete the following steps to install NI-488.2 for Solaris:

1. Insert the NI-488.2 for Solaris installation CD.

2. You must have superuser privilege before you can install NI-488.2 for Solaris.

If you are not already a superuser, type su root and enter the root password.

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