Experimental Physics and
Industrial Control System

"Mark Rivers" <[email protected]> · Fri, 25 Mar 2011 23:52:44 -0500

If you open the asynGPIBSetup.adl screen from asynRecord.adl you can issue a Device Clear.  You can see if that clears the problem.

Does restarting the EPICS IOC fix the problem, or do you have to power-cycle the power supply?

Mark

________________________________

From: [email protected] on behalf of Robert Emery
Sent: Fri 3/25/2011 11:36 PM
To: [email protected]
Subject: GPIB DCL

I am using EPICS 3.14.12, ASYN 4.15 to control a Kikusui power supply
via an Agilent E5810.  After I use an ASYN record to send a request to
the power supply with bad syntax, the power supply will not reply to any
further requests until I have cycled the power on the supply.  When I
try to repeat this situation without EPICS, using only the web interface
of the E5810 to send GPIB requests, the power supply will respond to
requests after it has received one with bad syntax.  I do not know how
the E5810 is getting around the problem.  I tried setting the ifc
(interface clear) flag in the vxi11Configure command.  Using the
asynSetTraceMask I can see that the ifc command is issued after sending
a GPIB request with bad syntax, and on the scope I can see the IFC line
go low, but this does not solve the problem.  I wanted to try sending a
dcl (clear device) command.  Is there an easy way to do this with ASYN? 
I saw a reference to a command IBDCL in asynGPIB, but I'm not sure how
to access this.

Thanks,

Rob Emery
UW Medical Center

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System