Mark,
So the entry-level system might look like this:
D0-05DR 8 DC IN / 6 RELAY OUT MICRO PLC W/AC P/S $119.00
H0-ECOM100 10/100MBIT ETHERNET COMMUNICATION MODULE DL05/06 OPTION MODULE WITH MODBUS TCP $199.00
Anything else I'd need?
(footnote: 8 inputs will be more than enough. I selected the relay outputs thinking I could easily picture wanting to turn on a light or operate a solenoid valve. But that's not a requirement at the moment.)
Paul
On Sep 27, 2011, at 10:27 AM, Mark Rivers wrote:
> 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
>
>
>
>
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- Re: Simple ADC - Ethernet device? Pete R. Jemian
- Re: Simple ADC - Ethernet device? David Dudley
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