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SMART TEMP SMT-131 Hotel Touchscreen Thermostat User Manual
and run before heat or cool calls from the W & Y relays.
43 Thermostat response to
changes in room
0: Very Fast
1: Fast
Temperature Ver 4.04+
2: Normal
3: Slow (Default)
4: Very Slow
44 Firmware Ver 41.1 +
2 Pipe heating threshold
45 Firmware Ver 41.1 +
2 Pipe cooling threshold
Range 5 to 50 (default 30c)
Range 5 to 50 (default 20c)
t
Temperature calibration
Offset Ver 4.04+
-9.9c to +10c 0.0 (Default)
This permits you to apply a correction offset factor to the
room (or remote) temperature sensor used by the SMT-131.
0: NO
r
Factory Reset
1:Yes (Exit to initiate)
Modbus Data – Addendum 1
The SMT-131 has integrated Modbus RTU communications. Using a Modbus master controller
such as the Smart Temp 770-HMI many of the SMT-131 thermostat features can be centrally
controlled and monitored.
Modbus is a simple protocol that is extremely popular due to its robustness and simple
implementation. It is also a “forgiving” protocol and will tolerate many installation errors. This
being stated however; correct wiring practices should be used to achieve maximum reliability.
The SMT-131 Modbus data is within the “40XXX” range, this being holding registers. Depending
on your choice of Modbus Master you may need to enter the address using the full address - such
as “40012” or by selecting “Holding Registers” and entering the address simply as “12”.
These modbus registers are shown as Base “1” (PLC addressing) format. Depending on your
modbus master addressing format you may need to subtract 1 from these values to convert to
base “0” (protocol addressing) format.
Note - The Modbus data layout may seem unorganised in this document, for example 0-10v for
heat and cool is at register 40040 & 40041 while the 0-10V output for the fan is at register 40068.
This is done to maintain backwards compatibility with the SMT-131 version 1 ModBus registers.
All the new functions added to version 2 of the SMT-131 have their Modbus registers at the end
of the version 1 SMT-131 Modbus register list.
Page 18
| General | Details |
|---|---|
| Name | SMART TEMP SMT-131 Hotel Touchscreen Thermostat User Manual |
| Make | SMART TEMP |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.34 MB |
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