Viewing The Hp 3326A Hp-Ib Address; Changing The Hp 3326A Hp-Ib Address; Bus Messages - HP 3326A Operating And Reference Manual

ViewingIChanging
HP-IB Address
The talk and listen addresses fall within the printable ASCII character set. When a device
receives one of these characters while ATN is true, it becomes addressed. The ASCII
character "?" (ASCII 31) unaddresses all devices while ATN is true. The device ad-
dress (set from the HP 3326A front panel) is used by HP-IB controllers most of which
automatically send the talk and listen address characters.
VIEWING THE HP 3326A HP-IB ADDRESS
The HP-IB address of Phe HP 3326A is stored in a nonvolatile memory (there are no
address switches). The HP 3326A address appears in the display when the BUS AD-
DRESS key in the HP-IB STATUS block is pressed. The BUS ADDRESS key is selected
by pressing the blue SHIFT key followed by the LOCAL key. The HP 3326A address
is removed from the display by pressing another key that requires the display.
CHANGING THE HP 3326A HP-IB ADDRESS
Every device on the HP-IB must have a unique address. The HP 3326A address can
be set at any address between 0 and 30, inclusive and is stored in internal nonvolatile
memory. When selecting an address, remember that the controller also has an address
(usually 21). To change the HP-IB address:
Press the blue SHIFT key followed by the LOCAL key in the HP-IB
STATUS block to display the HP-IB address.
Enter the address with the numeric keypad. For two digit HP-IB ad-
dresses, the address is set when the second digit is entered. For
a single digit HP-IB address, the address is set when any units key
is pressed. Alternately, a zero can precede the single digit to form
a two digit address.
NOTE
The HP-IB address is reset to 18 after a memory
clear opera tion.
The message "Error 20 RNGE" is displayed if the HP-IB address ex-
ceeds 30.
BUS MESSAGES
The HP-IB interface system operates in either of two modes: command mode (ATN bus
management line true) or data mode (ATN bus management line false). If an HP con-
troller is used, the bus management lines are configured automatically and all neces-
sary command strings are issued.
In the command mode, devices on the HP-IB can be addressed or unaddressed as
listeners or talkers. Bus commands are also issued in the command mode. These com-
mands may instruct the HP-IB interface to control the instrument (like CLEAR or TRIG-
GER) but are more often used for bus management (REMOTE, LOCAL, POLLS, SERV-