National Instruments NI-488.2 ユーザーズマニュアル

© National Instruments Corporation

•

ibcac

 and 

ibgts

.

•

Any NI-488.2 multi-device calls that issue GPIB command bytes: 

SendCmds

, 

PPoll

, 

Send

, and 

Receive

.

Possible solutions for this error are as follows:

•

Use 

ibsic

 or 

SendIFC

 to make the GPIB interface become CIC on 

the GPIB.

•

Use 

ibrsc

 

1

 to make sure your GPIB interface is configured as 

System Controller.

•

In multiple CIC situations, always be certain that the CIC bit appears 
in the status word 

ibsta

 before attempting these calls. If it does not 

appear, you can perform an 

ibwait

 (for CIC) call to delay further 

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 

ibcmd

 to address your device.

•

Check your cable connections and make sure at least two-thirds of 
your devices are powered on.

•

Call 

ibpad

 (or 

ibsad

, if necessary) to match the configured address 

to the device switch settings.