HP 4284A - Page 205

HP-IB Addressing
The HP 4284A's HP-IB address is stored in non-volatile memory and
can b e set to any address from 0 to 30 by front panel key entry in the
SYSTEM CONFIG page. When the HP 4284A is shipped from the
factory the default HP-IB address is 17. For more information, refer
to \How to Set the HP-IB Address" in Chapter 5.
HP-IB Bus Capability
The HP 4284A will resp ond to the following bus commands which
are given as HP 9000 series 200/300 BASIC statements.
ABORT I/O (IFC)
ABORT I/O (IFC control line TRUE) halts all bus activity and
deselects the HP 4284A.
For example:
ABORT 7
CLEAR LOCKOUT/SET LOCAL
CLEAR LOCKOUT/SET LOCAL (REN control line false) releases
devices on the bus from the lo c
kout mo de and returns them
to lo cal (front panel) control. The dierence b etween CLEAR
LOCKOUT/SET LOCAL, and LOCAL is in the addressing metho d
used.
For example:
LOCAL 7
DEVICE CLEAR (SDC or DCL)
This command can b e used with an address to clear a particular
device (SDC : selected device clear) or used without an address (DCL
: clears all devices). The HP 4284A will initialize the follo
wing items
only when it receives this command. Then the:
Input buer is cleared
Output data buer is cleared
Bit 4 (MAV bit) of the status byte is set to \0"
For example:
CLEAR 7
LOCAL (GTL)
LOCAL returns control of a listening device to front panel control.
For example:
LOCAL 717
7-4 Remote Control