Wide SCSI

The interface of the AIT autoloader is Wide SCSI. In order to connect the AIT autoloader to a Narrow SCSI bus, use a 50-pin to 68-pin LVD SCSI adapter. Also, make sure every unused data lines are terminated by an adapter.

SCSI ID

Set a unique SCSI ID for each device on a SCSI bus. The host computer uses these SCSI IDs to differentiate between the devices. Also, the SCSI IDs are used to prioritize the order of communication when several devices are communicating with the host computer. The lower the ID number, the lower the priority it has.

Caution

The SCSI ID of a device has nothing to do with its physical location. For example, in a SCSI bus that has multiple devices connected to it, the SCSI ID of the last device can be 2.

SCSI Bus Termination

If the AIT autoloader is the device connected to the end edge of the SCSI bus, you must attach a terminator to the unused SCSI connector to terminate the SCSI bus. Now, the AIT autoloader can supply electric power to the terminator. For information about details, see “Setting the DIP Switches” (page 19) in Chapter 2, “Installation”.

Error Code List

When the AIT autoloader generates an error, an error code appears on the message display. The following is the list of error codes that can appear on the message display. If a message from the list appears on the message display, contact customer service.

If an error code appears on the message display that does not figure in this list, before contacting customer service verify the LED on the front of the AIT autoloader, as well as perform the operations outlined in “Other Messages” (page 52)

If the problem persists, contact customer service.

Error code

Description

Display

Logged

 

 

 

 

00

No valid error code

—

No

information.

 

 

 

 

 

 

 

01

Detected a microcode

[0 1] appears on the

No

anomaly upon startup.

message display.

 

 

 

 

 

 

02

Detected a base RAM

[0 2] appears on the

No

anomaly upon startup.

message display.

 

 

 

 

 

 

 

Detected a buffer RAM

[L ] and [0 3] appear

 

03

anomaly upon startup.

alternately on the message

No

 

 

display.

 

 

 

 

 

 

The Identify message

 

 

20

detected a SCSI parity error

—

Yes

 

after selection.

 

 

 

 

 

 

 

Detected SCSI parity error.

 

 

21

Message Out phase retried

—

Yes

 

but gave up.

 

 

 

 

 

 

Appendix 47