Hi Spanky (well hope you get to read this).
I've been corresponding with RCS regarding a weird heat and cool setpoint issue (I'm operating in celcius mode). Basically when sending setpoint commands to the thermostat, sometimes I get one response back and sometimes I get 2 back, with the second resposone showing the setpoint 1 degree lower than what I sent... Here is the mail I've sent RCS. To date they have been great so absolutely no rant at them. I cant work out if its an RCS thermostat issue or if its the ELK, why it would bbe doing it
Hello RCS
Thankyou for your response. My configuration is:
ELK M1 Gold with serial expander (M1EXP) connected via RS485 to TR40. I
am able to use an ELK software tool (windows based on my laptop called
M1SDK) to send commands to the ELK from my laptop and view the response
data from the ELK. For each command I send the ELK, it sends me data in
return. For each thermostat command I send, I get a reply as to mode,
temp and setpoints.
When sending commands from the Software tool (M1SDK) , these are being
received 100% by the RCS as they are displayed correctly on the WDU. So
setting the setpoints and modes, all are reflected correctly on the WDU,
its the return response I get from the thermostat thats the issue.
I am not able to see if its around a particular temp value however the
issue is present on heat and cool setpoints.
For example:
Sending 18c as heat setpoint from ELK
Command: ts01185
ts=send command
01=thermostat 1
18=value
5=heat setpoint
response:
RECV 15:21:24 -- 13TR0131020182600000E
TR=thermostat response
01=thermostat number
310=mode, fan etc
20=current temp
18=heat setpoint
26=cool setpoint
this is correct however at times I get 2 responses back from the command ie:
RECV 15:21:24 -- 13TR0131020182600000E
RECV 15:21:25 -- 13TR0131020172600000F
The first response is 100% ok, I then get a second response where the heat
setpoint is 17.
I changed the heat setpoint from 18c to 14c: The response I got:
RECV 17:37:07 -- 13TR0131021 14 26000011
RECV 17:37:08 -- 13TR0131021 13 26000012
The first response is correct and for some reason I get a second that is
one degree lower.
I then changed a cool setpoint to 23c
RECV 15:30:44 -- 13TR013102118 23 000010
RECV 15:30:45 -- 13TR013102118 22 000011
The first response is correct and then it is 1 degree lower.
I'm at a loss as to any pattern. Unfortunately I dont have a rs232 to
rs485 device that I can test to break the problem in 1/2..
Your thoughts ?
Cheers..Peter
> Mr. Illmayer:
>
> If the WDU is showing your setpoint [SP] value, you sent via the ELK,
> correctly...and...operating off that SP correctly [that says both units
> are
> working with the 18 degree SP] then I'd say the "feedback" translation is
> getting "clipped" somewhere between the ELK and the input [wire] to the
> TR40's RS485 connections.
> What ELK "tool" reads the incoming data from the TR40....and which side of
> the ELK connection does it read off?
> RCS thermostat sends temp value in whole numbers; if it were rounding down
> to 17, inside the stat, you'd see HEAT turnoff happen at a different value
> then 18 on the WDU during standard manual operation.
>
> RCS, Inc
I've been corresponding with RCS regarding a weird heat and cool setpoint issue (I'm operating in celcius mode). Basically when sending setpoint commands to the thermostat, sometimes I get one response back and sometimes I get 2 back, with the second resposone showing the setpoint 1 degree lower than what I sent... Here is the mail I've sent RCS. To date they have been great so absolutely no rant at them. I cant work out if its an RCS thermostat issue or if its the ELK, why it would bbe doing it
Hello RCS
Thankyou for your response. My configuration is:
ELK M1 Gold with serial expander (M1EXP) connected via RS485 to TR40. I
am able to use an ELK software tool (windows based on my laptop called
M1SDK) to send commands to the ELK from my laptop and view the response
data from the ELK. For each command I send the ELK, it sends me data in
return. For each thermostat command I send, I get a reply as to mode,
temp and setpoints.
When sending commands from the Software tool (M1SDK) , these are being
received 100% by the RCS as they are displayed correctly on the WDU. So
setting the setpoints and modes, all are reflected correctly on the WDU,
its the return response I get from the thermostat thats the issue.
I am not able to see if its around a particular temp value however the
issue is present on heat and cool setpoints.
For example:
Sending 18c as heat setpoint from ELK
Command: ts01185
ts=send command
01=thermostat 1
18=value
5=heat setpoint
response:
RECV 15:21:24 -- 13TR0131020182600000E
TR=thermostat response
01=thermostat number
310=mode, fan etc
20=current temp
18=heat setpoint
26=cool setpoint
this is correct however at times I get 2 responses back from the command ie:
RECV 15:21:24 -- 13TR0131020182600000E
RECV 15:21:25 -- 13TR0131020172600000F
The first response is 100% ok, I then get a second response where the heat
setpoint is 17.
I changed the heat setpoint from 18c to 14c: The response I got:
RECV 17:37:07 -- 13TR0131021 14 26000011
RECV 17:37:08 -- 13TR0131021 13 26000012
The first response is correct and for some reason I get a second that is
one degree lower.
I then changed a cool setpoint to 23c
RECV 15:30:44 -- 13TR013102118 23 000010
RECV 15:30:45 -- 13TR013102118 22 000011
The first response is correct and then it is 1 degree lower.
I'm at a loss as to any pattern. Unfortunately I dont have a rs232 to
rs485 device that I can test to break the problem in 1/2..
Your thoughts ?
Cheers..Peter
> Mr. Illmayer:
>
> If the WDU is showing your setpoint [SP] value, you sent via the ELK,
> correctly...and...operating off that SP correctly [that says both units
> are
> working with the 18 degree SP] then I'd say the "feedback" translation is
> getting "clipped" somewhere between the ELK and the input [wire] to the
> TR40's RS485 connections.
> What ELK "tool" reads the incoming data from the TR40....and which side of
> the ELK connection does it read off?
> RCS thermostat sends temp value in whole numbers; if it were rounding down
> to 17, inside the stat, you'd see HEAT turnoff happen at a different value
> then 18 on the WDU during standard manual operation.
>
> RCS, Inc
