National Instruments GPIB-MAC User Manual page 47

November 1985
The GPIB commands, or interface messages, are listed
in Appendix A. They include device talk and listen
addresses, secondary addresses, messages, device clear
and trigger instructions, and other management
messages.
Do not use cmd to send programming instructions to
devices. Use
programming instructions and other device dependent
information.
The cmd operation terminates when:
After cmd terminates, the GPIB-MAC records the
number of command bytes it actually sent. If an event in
the above list occurs, the count may be less than
expected
If you specify #count and enter more than #count
command bytes, the excess command bytes up to the
If you call cmd and the GPIB-MAC is not CIC, the
36 SECTION FOUR - FUNCTIONS
rd
and wrt to send or receive device
the GPIB-MAC successfully transfers all commands,
the GPIB-MAC detects an error (GPIB-MAC is not
time
I/O
the
the Take Control (TCT) command is in your
command string and is sent to the GPIB.
the Interface Clear (IX) message is received from
System Controller (not the GPIB-MAC).
is exceeded,