Chapter 5
Configure Your Software with IBCONF
© National Instruments Corp.
5-11 GPIB-232CT-A for MS-DOS/Windows
Serial Poll Timeouts (Device Characteristic Only)
This timeout value controls the length of time the driver waits for a serial
poll response from a device. The ANSI/IEEE 488 standard does not specify
the length of time a Controller should wait for the response byte. The driver
default of 1 s should work for most devices.
Terminate READ on EOS
Some devices send an EOS byte signaling the last byte of a data message.
A
yes
response to this field causes the GPIB board to terminate a read
operation when it receives the EOS byte. The default option for this
characteristic is
no
. See also the EOS Byte section.
Set EOI with EOS on Write
A
yes
response to this field causes the GPIB board to assert the EOI line
when the EOS byte is detected on a write operation. The default option for
this characteristic is
no
. See also the EOS Byte section.
Type of Compare on EOS
This field specifies the type of comparison to be made with the EOS byte.
You may indicate whether all eight bits are to be compared or just the seven
least significant bits (ASCII or ISO format). This field is only valid if a
yes
response was given for either the Set EOI with EOS on Write field or
the Terminate Read on EOS field. The default option for this characteristic
is
7-bit
. See also the EOS Byte section.
EOS Byte
You can program some devices to terminate a read operation when a
selected character is detected. A linefeed character (hex 0A) is a common
EOS byte.
Note:
The driver does not automatically append an EOS byte to the end
of data strings on write operations. You must explicitly include
this byte in your data string. The designation of the EOS byte is