Elsner eTR 101 Manual

EN
eTR 101 Modbus
Room Temperature Control Unit
Manual
Article numbers
30180/84 (white), 30181/85 (black)
1. Safety and use instructions
Installation, testing, operational start-up and troubleshooting should
only be performed by a qualified electrician.
CAUTION!
Live voltage!
• Inspect the device for damage before installation. Only put undamaged
devices into operation.
• Comply with the locally applicable directives, regulations and provisions for
electrical installation.
• Immediately take the device or system out of service and secure it against
unintentional switch-on if risk-free operation is no longer guaranteed.
Use the device exclusively for building automation and observe the operating inst-
ructions. Improper use, modifications to the device or failure to observe the opera-
ting instructions will invalidate any warranty or guarantee claims.
Operate the device only as a fixed-site installation, i.e. only in assembled condition
and after conclusion of all installation and operational start-up tasks, and only in the
surroundings designated for it.
Elsner Elektronik is not liable for any changes in norms and standards which may
occur after publication of these operating instructions.
For information on installation, maintenance, disposal, scope of
delivery and technical data, please refer to the installation
instructions.
2. Description
The Room Temperature Control Unit eTR 101 Modbus measures the room
temperature and displays the current value. The target temperature can be changed
using the + and - touch buttons.
The eTR 101 Modbus is a Modbus server with RS485 interface and RTU protocol.
Modbus client, e.g. PC, SPS or MC, can read the measured values and other settings
with "Function 04h (read input registers)" or with "Function 06H (write single regis-
ter)" and "Function 10H (write multiple registers)" adjust, for example, the display of
the setpoint or the basic setpoint shifts.
Functions:
• Temperature measurements.
• Display of the current temperature or the setpoint and the basic setpoint
shifts
• 2 touch keys (+/-) for changing the target temperature or the basic setpoint
shifts
3. Views and device operation
3.1. Adjust room temperature
Depending on the setting from the modbus client, the Room Temperature Cont-
rol Unit eTR 101 Modbus displays the current room temperature value or the set-
point or the shift compared to the basic setpoint. Using the client, the operating mo-
de, the type and the brightness of the display, along with other values, can be set.
Possibility A: Display off
The LED display is off. Manual changing of the target temperature using the +/- keys
is not possible.
Possibility B: Current temperature displayed (room temperature)
The current room temperature is displayed. Manual changing of the target tempe-
rature using the +/- keys is not possible.
Possibility C: Display of the target temperature or basic target temperatu-
re
Depending on the setting, the current setpoint or the shift compared to the basic set-
point is displayed. The target temperature can be adjusted by pressing the +/- keys.
Room Temperature Control Unit eTR 101 Modbus • Version: 30.04.2025 • Technical changes and errors excepted. • Elsner Elektronik GmbH • Sohlengrund 16 • 75395 Ostelsheim • Germany • www.elsner-elektronik.de • Technical Service: +49 (0) 7033 / 30945-250
Room Temperature Control Unit eTR 101 Modbus
Setpoint display (absolute value):
Display of the basic setpoint shift (change compared to the basic setpoint of the
controls):
Possibility D: Display of the current temperature and the target tempera-
ture / basic setpoint shift
In normal mode, the current room temperature is displayed. Touching the keys
changes the display to the target temperature or the basic setpoint shift, depending
on the setting. Changes with + or - become visible. The display returns to room tem-
perature if a touch key is not pressed for 5 seconds.
Gently press touch key + or -: The current target temperature (or the basic setpo-
int shift) is displayed.
Press +: Increase room temperature
(Target temperature / basic setpoint shift is increased).
Press -: Lower room temperature
(Target temperature / basic setpoint shift is lowered).
General information:
The increments for the change and the possible setting range are specified using the
modbus client.
4. Transmission protocol
Apart from register 0, 1, 4 and 5, the values communicated by the client are stored
per register in the server.
Re
gis Data
ter Parameter type
0 Actual temperature Signed
16bit
1 Sensor Fault 1 = On, Unsig-
0 = Off ned 16bit
2 Actual temperature Signed
offset 16bit
3 LED brightness % Unsig-
ned 16bit
4 LED On Off 1 = On, 0 Unsig-
= Off ned 16bit
5 LED Auto Off Activa- Unsig-
tion ned 16bit
6 LED Auto Off Time Unsig-
ned 16bit
7 LED display Temp 1 Unsig-
= On, 0 = Off ned 16bit
8 Substations Type Unsig-
operation 0 = not ned 16bit
used, 1 = basic set-
point shift (a), 2 =
setpoint (b)
9a Basic setpoint shift Unsig-
PLUS Max ned 16 bit
Press +:
Increase room temperature
(Target temperature is increased)
Press -:
Lower room temperature
(Target temperature is lowered)
Press +:
Increase room temperature
(Basic setpoint shift, PLUS directi-
on)
Press -:
Lower room temperature
(Basic setpoint shift, MINUS direc-
tion)
or
Example
Start
ing Func- Raw
Range value tion value
Signed Output 253
16 bit*
0 or 1 Output 1
-5 to +5K 0 Input/ 15
Output
0 to 80 Input/ 55
100% Output
0 or 1 1 Input/ 1
Output
0 or 1 1 Input/ 1
Output
1 to 255 10 Input/ 1
Output
0 or 1 1 Input/ 1
Output
0 to 2 1 Input/ 1
Output
0 to +5K 3 Input/ 30
Output
1
Value
with
unit
25.3 °C
1
1.5 °C
55 %
1
1
1
1
1
3.0 °C