Experimental Physics and
Industrial Control System

Robert Emery <[email protected]> · Fri, 25 Mar 2011 23:42:30 -0700

Thanks for the reply Mark.

Restarting the IOC does not fix the problem. I have to power cycle the

power supply.

I tried "Selected Device Clear" via the asynRecord ACMD field. This had

no effect and did not write anything out through the ethernet port.

asynTrace produced:

epics>  2011/03/25 23:30:03.964 ISMGateway addr 1 queueRequest priority 0
not lockHolder
2011/03/25 23:30:03.964 ISMGateway schedule queueRequest timeout
2011/03/25 23:30:03.964 ISMGateway callback
2011/03/25 23:30:03.964 ISM:Get: asynCallbackProcess, state=3
2011/03/25 23:30:03.964 ISMGateway 1 vxiAddressedCmd b791d30a
2011/03/25 23:30:03.964 ISMGateway 1 vxiAddressedCmd
2011/03/25 23:30:06.115 ISMGateway addr 1 vxiAddressedCmd requested 6
but sent -1 bytes
2011/03/25 23:30:10.468 ISM:Get: Error in GPIB Addressed Command write,
ISMGateway 1 vxiAddressedCmd requested 6 but sent -1 bytes

2011/03/25 23:30:10.468 ISMGateway addr 1 queueRequest priority 0 not
lockHolder
2011/03/25 23:30:10.468 ISMGateway schedule queueRequest timeout
2011/03/25 23:30:10.468 ISMGateway callback
2011/03/25 23:30:10.468 ISM:Get: asynCallbackProcess, state=3
2011/03/25 23:30:10.468 ISM:Get flush
2011/03/25 23:30:10.468 ISMGateway 1 vxiWrite numchars 5
2011/03/25 23:30:11.616 ISMGateway vxiIfc
2011/03/25 23:30:11.618 ISM:Get: nwrite=5, status=1, nawt=0
2011/03/25 23:30:12.764 ISMGateway vxiIfc
2011/03/25 23:30:12.766 ISM:Get: inlen=0, nbytesTransfered=0,
ntranslate=0

I also tried "Clear Device" via the asynRecord UCMD field with similar

results.

epics>  2011/03/25 22:55:08.317 ISMGateway addr 1 queueRequest priority 0
not lockHolder
2011/03/25 22:55:08.317 ISMGateway schedule queueRequest timeout
2011/03/25 22:55:08.317 ISMGateway callback
2011/03/25 22:55:08.317 ISM:Get: asynCallbackProcess, state=3
2011/03/25 22:55:08.317 ISMGateway vxiUniversalCmd 14
2011/03/25 22:55:10.415 ISM:Get: GPIB Universal command ISMGateway
vxiUniversalCmd failed

2011/03/25 22:55:10.416 ISMGateway addr 1 queueRequest priority 0 not
lockHolder
2011/03/25 22:55:10.416 ISMGateway schedule queueRequest timeout
2011/03/25 22:55:10.416 ISMGateway callback
2011/03/25 22:55:10.416 ISM:Get: asynCallbackProcess, state=3
2011/03/25 22:55:10.416 ISM:Get flush
2011/03/25 22:55:10.416 ISMGateway 1 vxiWrite numchars 5
2011/03/25 22:55:11.568 ISMGateway vxiIfc
2011/03/25 22:55:11.572 ISM:Get: nwrite=5, status=1, nawt=0
2011/03/25 22:55:12.768 ISMGateway vxiIfc
2011/03/25 22:55:12.770 ISM:Get: inlen=0, nbytesTransfered=0,
ntranslate=0

On 3/25/11 9:52 PM, Mark Rivers wrote:

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