Experimental Physics and
Industrial Control System

I am running into a problem with ASYN connection feedback I was wondering if anyone could help. Here's what I have set up:

Hardware: I have an IOC running on debian which communicates via ethernet to an Agilent E5801A LAN/GPIB Gateway which then communicates to several GPIB Power Supplies.

In st.cmd I set up asyn ports using
���� vxi11Configure("Portname", "192.128.0.X", 0, 1000, "gpib0")

and also reboot the gateway using
���� E5810Reboot("192.168.0.64",0)

I then have databases running that do appropriate string formatting for GPIB commands and put them in the .AOUT field of an ASYN record configured as follows:

� DTYP= asynRecordDevice
� PORT=Portname
� ADDR=GPIB_ADR
� TMOD=READ/WRITE

The communication works fine and the device responds as commanded. The problem I am running into is when I physically unplug the Ethernet cable between the gateway and IOC, I get read/write errors in the ERRS field when the record processes but it still says �Connect� in the .CNCT field.

With other devices using

� drvAsynIPPortConfigure
� modbusInterposeConfig
� drvModbusAsynConfigure

The ASYN records .CNCT field changes when I unplug the Ethernet cable to Disconnect.

I tried setting up a drvAsynIPPortConfigure to talk with the gateway and to see if the connection is monitored that way, couldn't get that to work either. I don't think it ever establishes a valid communication link because it starts out as disconnect and I get timeout messages from traceError in the IOC shell.

I am wondering where I what to do next. Should I try creating device support for the devices connected to the gateway, would it even be possible through device support? Has anyone encounter this problem and came up with a solution? Any help is appreciated.

Thanks,
Mathew Hicks

Replies:

ADEL field in motor record Pearson, MR (Matthew)

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