National Instruments NI-488.2 User Manual page 97

Solutions
ENOL (2)
Solutions
© National Instruments Corporation
• and
ibcac ibgts
• Any NI-488.2 multi-device calls that issue GPIB command bytes:
,
SendCmds PPoll
Possible solutions for this error are as follows:
• Use or
ibsic SendIFC
the GPIB.
• Use to make sure your GPIB interface is configured as
ibrsc 1
System Controller.
• In multiple CIC situations, always be certain that the CIC bit appears
in the status word
appear, you can perform an
processing until control is passed to the interface.
ENOL usually occurs when a write operation is attempted with no
Listeners addressed. For a device write, ENOL indicates that the GPIB
address configured for that device in the software does not match the GPIB
address of any device connected to the bus, that the GPIB cable is not
connected to the device, or that the device is not powered on.
ENOL can occur in situations where the GPIB interface is not the CIC and
the Controller asserts ATN before the write call in progress has ended.
Possible solutions for this error are as follows:
• Make sure that the GPIB address of your device matches the GPIB
address of the device to which you want to write data.
• Use the appropriate hex code in
• Check your cable connections and make sure at least two-thirds of
your devices are powered on.
• Call (or
ibpad ibsad
to the device switch settings.
Appendix C
.
, , and
Send Receive
to make the GPIB interface become CIC on
before attempting these calls. If it does not
ibsta
(for CIC) call to delay further
ibwait
ibcmd
, if necessary) to match the configured address
C-3
Error Codes and Solutions
.
to address your device.
NI-488.2 User Manual for Windows