Fujitsu M2488 manual Played on the op panel display

M2488 PRODUCT GUIDE			TAPE UNIT PARAMETERS
	Table 5-3. Page 00 -Vendor Unique Parameter Field Description (Continued)
BYTE	BIT	VALUE	DESCRIPTION
3	2	1	When the FRU bit is set to one, the Diagnostic Error codes listed in Appendix F are dis-
			played on the op panel display.
		0	When the FRU bit is set to zero, the Diagnostic Error codes are not displayed on the op
			panel display.
			The FRU bit is reported as changeable on a MODE SENSE command and the default value
			is zero.
4	0-7	FEh	The Automatic Data Transfer Timeout (ADTT) field indicates an automatic data transfer
			timeout value in 200ms increments with 00h representing an initial 200ms timeout; i.e.,
			actual_timeout = 200ms + (selected_timeout_value*200ms). For example, a value of 01h
			indicates automatic data transfers will timeout in 400ms; i.e., 200ms + (1*200ms) = 400ms.
			The ADTT is calculated in 200ms increments for values of 00h to FEh in the ADTT field.
			The ADTT value of FFh indicates a timeout of 2 minutes.
			If a value of 00h or 01h is set in this field (200ms or 400ms timeouts respectively), the
			Retry Buffer Retries is automatically disabled.
			The ADTT is active only during the data phases (DATA-IN/DATA-OUT) while transferring
			data blocks between the initiator and the target using commands such as READ, READ
			REVERSE, WRITE, etc. The ADTT is not active for manual data transfers such as
			REQUEST SENSE DATA, LOG SENSE DATA, MODE SENSE DATA, etc.
			The ADTT field is reported as changeable on a MODE SENSE command and the default
			value is FEh.

April 1997 CG00000-011503 REV. A 5-3