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<== Date ==> <== Thread ==>
Subject: Re: StreamDevice, prevent records from getting "stuck"
From: Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>
To: "Sobhani, Bayan" <bsobhani at bnl.gov>
Cc: tech-talk <tech-talk at aps.anl.gov>
Date: Mon, 6 Apr 2020 22:09:36 +0000 
What asyn driver are you using (drvAsynIPPort, drvAsynSerialPort, etc.)?


You should run the following to see if the problem is in the asyn driver


asynReport 10 PortName


where PortName is the name of the asyn port.  That will tell you if the port is connected, etc.


Mark



________________________________
From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Sobhani, Bayan via Tech-talk <tech-talk at aps.anl.gov>
Sent: Monday, April 6, 2020 4:57 PM
To: tech-talk at aps.anl.gov
Subject: StreamDevice, prevent records from getting "stuck"


For StreamDevice I notice that sometimes when the signal is noisy, the PV gets "stuck" if it makes one too many failed requests to the device. Getting "stuck" means that no matter how many times I process the PV with a StreamDevice OUT field, it does not seem to attempt to send anything to the device until I restart the IOC.



I see no technical reason why this must happen so I think this is probably something intentional in StreamDevice. Can I turn this off? I want the PV to always try to send a signal to the device, and if it can't I want to see the red letters saying there was a mismatch.



Is there any way to prevent the PVs from getting "stuck"?



Alex
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RE: StreamDevice, prevent records from getting "stuck" Sobhani, Bayan via Tech-talk
References:
StreamDevice, prevent records from getting "stuck" Sobhani, Bayan via Tech-talk
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