IOtech Digital488 - Data Lines; Multiline Commands; Go to Local (GTL)

Section 4 IEEE 488 Primer
4.7
4.6 DATA LINES
The
GPIB
provides eight data lines for a bit parallel/byte serial data transfer.
These eight data lines use the convention of
DIO1
through
DIO8
instead of the
binary designation of
D0
to
D7
. The data lines are bidirectional and are active low.
4.7 MULTILINE COMMANDS
Multiline
(bus) commands are sent by the
Active Controller
over the data
bus with
ATN
asserted. These commands include addressing commands for talk,
listen, Untalk and Unlisten.
4.7.1 Go To Local (GTL)
This command allows the selected devices to be manually controlled.
($01)