HP 3336A - Page 71

Data
Trigger
Clear
Remote
Local
Local Lockout
Clear Lockout/
Set Local
Pass Control
Serial Poil
(Status Byte)
Abort I/O
Require Service
Appendix C
APPENDIX C
Select Code
Device
Listen
Talk
Output text and variables to single
devices.
Output single characters.
Input data from a device.
Input single characters.
Specify addresses and send data in
ASCH form.
Output data to multiple listeners.
Transfer data from device to device.
Send a ‘’Group Execute Trigger’’ to
all devices.
Send a ‘’Group Execute Trigger’’ to
selected devices.
Clear all devices.
Clear selected devices.
Enable remote mode on all devices.
Device will remote when addressed.
Set remote on selected devices.
Return selected device to front
panel control.
Prevent all devices from returning to
local mode.
Set local mode and disable local
lockout on all devices.
Transfer bus management to
another controller.
Input the Status Byte of a selected
device.
Clear all bus operations and return
the bus management to the system
controller.
Request Service from the controller.
-hp- 9825A Bus Message Implementation Table
instrument #2
Instrument #1
Controlter
-hp- 9825A
7
21
5
U
Sample implementation
wrt 704,'‘FR20.25MH"’
wtb 704,A
red 704,A
tdb (704)—A
cmd 7,‘‘?U$"',""FR20.25MH”’ yes
wrt ‘‘SYN1,SYN2"’,"AM-24.370B8"' yes |
cmd 7, '?U$1"',"“AM-24.37DB” yes
cmd 7, ‘‘?D1"' yes
trg 7 no
trg 711 no
cir 7 _yes
clr 704 yes
rem 7 yes
rem 704 yes
Icl 704 yes
{lo 7 yes
Icl 7 yes
pet 723 yes
rds (704)-A yes
cli 7 no
Originates from the device. yes*
*Controllers can send the Requires Service message, however, normally this message originates from the device. The -hp- 3336 can send this message. It will not res-
pond to a‘service request from another device or controller.