Subject: From: Date:

Re: [ECS] RC-Series Communicating Thermostat freemanb.us.ibm.com Tue, 9 Nov 1999 18:00:08 -0600

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I have implement two RC-100's on a single RS-232 serial port which I am
controlling with ECS 4.1.016.   Since (about) 4.1.003 ECS has included
support for the multidrop capabilities of these 'stats.  In terms of ECS's
implementation, it amounts to (in my case) two duplicate sets of items, one
for each stat.   Setting an item to "Read" causes ECS to interrogate the
'stat and update the item value.   Setting an item to a value causes ECS to
write the appropriate value to the physical 'stat register.   My
implementation only called for 60 or so feet of cable so I did not need an
RS-232 extender.

Regards,

Bill Freeman

freemanb@us.ibm.com


"bruce prager" <bgprager@mindspring.com> on 11/09/99 05:36:19 PM

Please respond to ecs-list@netbloc.com

To:   ecs-list@netbloc.com
cc:
Subject:  Re: [ECS] RC-Series Communicating Thermostat




Most "RS-232" thermostats are really RS-485 which is multi-drop RS-232,
Ie;
multiple addressed RS232 interfaces.
----- Original Message -----
From: Dave Kolb <davekolb@email.msn.com>
To: <ecs-list@netbloc.com>
Sent: Sunday, November 07, 1999 11:53 PM
Subject: Re: [ECS] RC-Series Communicating Thermostat


The HAI Omnistats can supposedly all be put on one RS232 line though that
seems very non standard to me. I guess it works because each is coded as a
unique device and only one will respond at a time. I have 6 total but have
not hooked them up to the OmniPro yet. They can also go to a PC but may
need
an RS232 extender if over a 500' run I think.

Dave

-----Original Message-----
From: Chris Armbruster <carmbruster@cyvolution.com>
To: ecs-list@netbloc.com <ecs-list@netbloc.com>
Date: Sunday, November 07, 1999 10:48 PM
Subject: [ECS] RC-Series Communicating Thermostat


>I am considering re-doing my zoned HVAC.  Currently, I have no
thermostats.
>Instead, I use temperature sensors, the analog inputs and relays on a
>MicroREDAC and Enerzone inflatable dampers.  I would prefer a system that
>has stand alone capability (in case the computer fails).  I am thinking
>about RC-Series Communicating Thermostats (RC-80).  I have a couple of
>questions about integrating the thermostats:
>
>1) Do I need a serial port for each thermostat or can I put all three on
the
>same port?
>
>2) Is there a way to set the swing temperature (this is the difference
from
>the setpoint that is necessary to turn the HVAC on or off)
>
>3) Do the RC-Series thermostats remeber their programs in the event of a
>power failure or will I have to reprogram them?
>
>Regards,
>Chris
>

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