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<== Date ==> <== Thread ==>

Subject: RE: Simple ADC - Ethernet device?
From: "Mark Rivers" <[email protected]>
To: "Paul Nord" <[email protected]>, <[email protected]>
Date: Tue, 27 Sep 2011 10:27:01 -0500
The EPICS Modbus driver works fine with the Koyo PLCs, and I have tested reading ADCs with it.
 
Mark
 

________________________________

From: [email protected] on behalf of Paul Nord
Sent: Tue 9/27/2011 10:22 AM
To: [email protected]
Subject: Re: Simple ADC - Ethernet device?



Josh,

The price on the Koyo devices is appealing.

But the EPICS driver seems to be for serial communication, not ethernet.

Paul


On Sep 27, 2011, at 9:50 AM, Josh Stein wrote:

> Although not purpose-built, we often use PLCs for simple analog acquisition. At APS the PLC-Direct brand (basically Koyo) is very ubiquitous.
>
>
>
> On 9/27/11 9:38 AM, Paul Nord wrote:
>> I need to monitor the pressure in a gas supply bottle.  We expect to need to change gas bottles every few days and we'd like to alert the detector operators in plenty of time.
>>
>> Getting a transducer to produce a voltage is simple enough.  I'm a little unclear about the next step: digitizing that voltage and getting that information to our EPICS softIOC.  I'd like a simple box that connects to the voltage and also to an ethernet port.
>>
>> There is an Epics driver for the environment monitor Websensor from Esensors Inc.  It monitors temperature, humidity, and illumination.  The device can also monitor a voltage reading.  I presume it would be easy modify the driver to also get the voltage reading.
>>
>>
>> Is there another ethernet-based ADC that you would recommend?
>>
>> There are some nice USB devices.  But I don't really want to setup a computer just to monitor one voltage remotely.
>>
>> I found some nice modular systems from Omega and NI.  Alas, there are no Epics drivers.
>>
>> Paul






Replies:
Re: Simple ADC - Ethernet device? Paul Nord
References:
Simple ADC - Ethernet device? Paul Nord
Re: Simple ADC - Ethernet device? Josh Stein
Re: Simple ADC - Ethernet device? Paul Nord

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