ReadString() get time limit exceed to complete operation error

[Dennis_Knutson]

Try setting terminate read on eos. The instrument does not appear to be compliant with IEEE-488.2 where it sends eoi.

[thangvq]

It does not work Dennis.

[Curt_C]

Hi,

Try using a byte count with the readstring command

device.ReadString(1024); 

try different count values

Also,

Try changing the bus timing setting to 2usec or 500nsec.

Curt

[Dennis_Knutson]

What did you set the eos byte to?

[thangvq]

@Curt_C. I have tried to ReadString(1024); ReadString(256) and also change bus timing to 2us; 500ns. No go.

@Dennis. I don't know which value of EOS byte is correct. I have tried with 0; 1; 13. Still error.

Any new idea?

Many thanks

Thang

[Dennis_Knutson]

It should be the same as your write termination. Try 10. You are reading some actual data it seems.

[Curt_C]

Hi,

Try using

device.ReadByteArray(1024);  //or some other value

Curt

[Dennis_Knutson]

It's actually kind of silly to not be doing the debug in MAX. Do a write and a read and show the results.

[thangvq]

@Dennis: Tried 10 for EOS byte. No go. The device does not show in NI MAX.
@Curt_C: Tried device.ReadByteArray(1024); // and 256 -> still error.

Any new idea?

Thanks and kind regards,
Thang

[Curt_C]

Hi,

There's something wrong with your meter. Does it have an rs232 port?

Curt