Programming in G Mode
Chapter 7
GPIB-610 User Manual
7-12
© National Instruments Corp.
•
When a serial-error occurs, that is, EPAR, EORN, or EFRM as
reported by
stat
.
•
When the serial device is not addressed as a Talker, and
-
any byte is received from the serial device, or
-
the EOS byte is received from the serial device.
Note:
You must use the
srqen
function to enable the GPIB-232CT to assert
SRQ under the conditions listed above.
Parallel Poll
The GPIB-232CT responds to a parallel poll by driving the line indicated
by the PPE command true if the value of its individual status bit matches
the sense bit of the PPE command and false otherwise.
Trigger
This has no effect on the GPIB-232CT.
Local
This has no effect on the GPIB-232CT.
Control
In G mode, the GPIB-232CT can act only as a Talker/Listener. It does not
make sense for the GPIB-232CT to be passed control, since all
programming instructions must be sent to it from another GPIB device.
However, the GPIB circuitry in the GPIB-232CT will allow it to be passed
control, in which case the GPIB-232CT will immediately assert ATN. This
is an error condition that can lock up your system and should therefore be
avoided.
