Experimental Physics and
Industrial Control System

"Allison, Stephanie" <[email protected]> · Tue, 14 Jul 2009 09:58:13 -0700

Hello,

We're testing a Genesys power supply (provided by Lambda-TDK) to which the vendor has added a TCP interface (I believe specifically by request of EPICS sites).  Burkhard Kolb at GSI provided me the protocol file for stream/asyn support for this type of device (thanks!).  However, the firmware has changed recently and one change is to remove the terminator from the reply strings.  Some replies are fixed-length so I can change the protocol file for these (to use maxInput).  However some replies are not fixed-length and I need to find support for those - I do not want to rely on a timeout to know that the reply is finished.  The vendor has suggested that (1) I assume the reply will never get fragmented and just allocate 100 bytes and take whatever I get and (2) block on the receive (which is not an option for an IOC).

Does anybody have experience with such devices (TCP ASCII SCPI commands that have no reply terminators and no fixed-length reply strings) and can recommend a solution?

Thank you,
Stephanie Allison
SLAC National Accelerator Lab

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System