Send GPIB SRQ signal through NIMAX

[Andrew Leung]

HI

Situation:

Assume I have connected two computer by 2 GPIB-USB-HS. I want to send a SRQ signal (E.g. SRQ 0x44) from the contoller side to the non-controller side by NIMAX console.

Question:

How to do it?

How do the non-controller side(receiver side) check the SRQ signal?

Andrew

[ManLongAtNI]

Hello Andrew,

When you conduct a serial poll, the Controller queries each device, searching for the one that asserted the SRQ line. I don't believe the controller side could send this signal as the system is designed for the non-controller to send the signal.  Could you clarify why you would need to do otherwise?

[Andrew Leung]

Dear Glenn,

You are right. I think I made a mistake on the situation description.  I want to simulate the non-controller side sending SRQ signal and the controller side receive this signal in nimax. The final goal of this test is making a debug environment of receiving different SRQ and the controller side react with different command. Is it possible to do this?

Regards,

Andrew

[ManLongAtNI]

Hi Andrew,

Thank you for the clarification. As you may already know, the SRQ is only one bit of the message and the rest of the message will define the action. There are ways to transmit messages through MAX through the Interactive Control, but as far as controlling the SRQ line directly in MAX doesn't seem necessary without the rest of the message. I was able to find some online documentation that tells you how to do this in LabVIEW, but another describes the why the rest of the message is necessary.

Asserting the SRQ Line in LabVIEW

GPIB Settings:Line SRQ State

Serial Polling and SRQ Servicing with NI-488.2 Software and LabVIEW