Chapter 5
S Mode Functions
© National Instruments Corp.
5-13
GPIB-232CT User Manual
Methods
R
and
B
determine how GPIB read operations
performed by the GPIB-232CT terminate. If Method
R
alone
is chosen, reads terminate when the low seven bits of the byte
that is read match the low seven bits of the EOS character. If
Methods
R
and
B
are chosen, a full 8-bit comparison is used.
Methods
X
and
B
together determine when GPIB write
operations performed by the GPIB-232CT send the END
message. If Method
X
alone is chosen, the END message is
sent automatically with the EOS byte when the low seven bits
of that byte match the low seven bits of the EOS character. If
Methods
X
and
B
are chosen, a full 8-bit comparison is used.
Note:
Defining an EOS byte for the GPIB-232CT does not
cause the GPIB-232CT to insert that byte into the
data string when performing GPIB writes. To send
the EOS byte, you must include it in the data string
that you send following the
wrt
programming
message.
By default, no
eos
modes are enabled.
If you call
eos
with B alone as an argument, the
GPIB-232CT records the EARG error.
If you call
eos
without an argument, the GPIB-232CT returns
to you the current
eos
settings.
The assignment made by this function remains in effect until
you call
eos
again, call
onl
, or you turn off the
GPIB-232CT.
See Also:
Chapter 4, the section entitled
GPIB Read and Write
Termination Method
.
