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LARTET DC-41SRTHO Technical Manual

Clock, thermometer, hygrometer and co2 measurement with gps, rs-485 and ethernet
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TECHNICAL MANUAL DC-41SRTHO
Clock, thermometer, hygrometer and CO
Introduction to the DC-41SRTHO
The DC-41SRTHO display is presented as an easy-to-use clock, thermometer, hygrometer and CO
measurer adjusted and calibrated at factory. The main window shows the current hour and minute,
temperature with 0,1ºC resolution, humidity with 1% resolution and CO
The main window can be set to turn on and turn off at the time set by user and is adjustable in brightness (see
"Parameters of the display" in this manual). There are add-on functions depending on the display. These
functions are fully compatible and can be combined with each other:
If the display includes option A, it has an integrated GPS. The antenna contents a magnet that permit
to fix it to a magnetic surface. The first time the display is turn on, the quality of the GPS signal must be
verified some minutes after the power-up. This is done using one of the parameters of the display (see "GPS
option" in this manual).
If the display includes option NE (Ethernet connectivity), this display hosts a web site where the user
can see the status of the display and configure it. This function allows the display to be used as a server for
other displays to synchronize the hour through the Ethernet, as well as updating its time and date through a
SNTP server. User can configure and request the time through TCP/IP commands. The default IP is
192.165.1.100. See "Ethernet option" in this manual for more information.
If the display includes option X (RS-485 connectivity), this display can be configured as a RS.485
server/client. This means that the display can connect with other displays to sync between them, as well as
the user communication through commands. If the display also includes the Ethernet option, the display can
work as a bridge between both options. See "RS-485 option" for more information
1660K023G
GPS, RS-485 and Ethernet.
measurement with
2
concentration with 1ppm resolution.
2
Page 1 of 30
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Summary of Contents for LARTET DC-41SRTHO

  • Page 1 GPS, RS-485 and Ethernet. Introduction to the DC-41SRTHO The DC-41SRTHO display is presented as an easy-to-use clock, thermometer, hygrometer and CO measurer adjusted and calibrated at factory. The main window shows the current hour and minute, temperature with 0,1ºC resolution, humidity with 1% resolution and CO concentration with 1ppm resolution.

  • Page 2: Powering The Display

    Installation of the DC-41SRTHO The DC-41 SRTHO displays can be fixed to the wall in two ways: 1– Hanged. Place 2 of the supplied plug at 314mm from one to the other. Insert the screws leaving their head outside for 4mm. Hang the display using the upper-side zig-zag.
  • Page 3 DC-41SRTHO characteristics. Power supply ..........100 VAC a 240 VAC 50/60Hz Consumption ..........35VA Consumption at minimum brightness ..13,2VA. Display Time ............... 4 digits 7segments 100mm height. Format HH:MM. Red LED. Temperature ..........3 digits 7segments 100mm height. Red LED.

  • Page 4: Modify Parameters

    Changing the time In case the user wants to change the time, the Advance key must be pressed for three seconds. Using the Advance (to change digit) and the Increase (to increase the value of the digit) keys the present time can be changed.
  • Page 5 Parameter 3: Time offset: This parameter allows the user to configure its time zone, as well as changing the time offset in summertime/wintertime when configuring it manually, or for personal purposes; always counting that internal time count of the clock is GMT. First digit shows an upper hyphen when adding time and a hyphen when subtracting Parameter 4: Display configuration: This parameter configures other functionalities of the display, as the brightness and the sync options.
  • Page 6 Parameter 9: RS-485 configuration. This parameter is shown if the display includes RS-485 option: Access this parameter pressing the Advance key. Change the code according to the desired configuration. Code Baud Rate Data bits Parity Stop bits 4800 Bauds 7 bits No parity 9600 Bauds 7 bits...
  • Page 7 Parameter A: GPS signal level: This parameter is only seen if the display includes GPS function. This parameter shows the quality of the GPS signal arriving to the antenna. Its maximum value is 50 and it must be over 20. If this occurs, the antenna must be moved closer to a window to get more signals. Parameter J: Maintenance parameter: This parameter is used in factory and must not be modified.

  • Page 8: Ethernet Option

    LAN, it is recommended to use the PC program “Display Discoverer”, downloadable from the web www.lartet.com. In this program, the displays connected to the LAN are displayed, as well as their IP addresses, their MAC addresses (all MAC are 00:04:A3:xx:xx:xx) and its name. The default name of the display is its serial number.
  • Page 9 Tip the new IP and click OK. There will appear a message in the main window with the message sent to the display. 1660K023G Page 9 of 30...
  • Page 10 After some seconds, click the “Refresh” button. The display appears with the new IP Click the display IP to open a new tab in the browser. The main page of the web server is shown. 1660K023G Page 10 of 30...

  • Page 11: User Interface

    User interface Ethernet connection allows a new interface, much easier than the usual in displays. All configuration can be done through a website hosted at the display, so the user only needs a device connected to the LAN with web browser (computers, smartphones, tablets…). There is no contact with the display, which usually is in a difficult access point.
  • Page 12 First tab allows the user to configure the same parameters as the parameter menu in an easier and more intuitive way. When the user configures the display to sync through SNTP or another display, the server must be written in the field. The second tab allows configuring the network parameters of the display, including the IP address, DNS, etc.

  • Page 13: Ethernet Network

    Ethernet network Many Ethernet networks can be configured to sync one or more displays. The possible networks are shown below, as well as the main actions/parameters (seen from the webpage) the user must configure. Other parameters don’t care. Networks with one display One display Time and date •...
  • Page 14 One display. SNTP sync There are two options. Both are configured the same way. • Configure net parameters • Sync: SNTP • Write the server addres in the field. SNTP server Ethernet network Ethernet network SNTP server • Configure net parameters •...
  • Page 15 Nets with more than one display Sync through a display with GPS The server display syncs itself with the GPS and others sync with the server display. Client display Server display • Configure net parameters • Configure net parameters • Sync: Display Ethernet •...
  • Page 16 Sync through SNTP. Only one display connects to the SNTP server. This works for both cases: connecting to a local SNTP server o a cloud SNTP server. Only one display is connected to the SNTP server and serves the time to the other displays Server display SNTP server •...
  • Page 17 Sync through SNTP. All displays connect to the SNTP server This works for both cases: connecting to a local SNTP server o a cloud SNTP server. All displays update from the SNTP server specified. SNTP server • Configure net parameters •...
  • Page 18 Communication with commands through Ethernet The displays can obtain the displayed parameters through commands, as well as force the display time through TCP/IP commands. In this case, the display must be configured for not to sync another way or the sync will rewrite the programmed time.
  • Page 19 Display temperature request Frame This frame only includes the code. This does not send any data. Code End of block ACII Hexa 50h 54h Response frame Code Data End of block ASCII Hexa 52h 54h Example: Temperature=17.2ºC Code Data End of block ASCII Hexa 52h 54h...
  • Page 20 Displayed CO concentration request Frame This frame only includes the code. This does not send any data. Code End of block ACII Hexa 50h 43h Response frame Code Data End of block ASCII Hexa 52h 43h Example: CO concentration=728ppm Code Data End of block ASCII...
  • Page 21 RS-485 option The RS-485 allows the user to create a network for the displays to be synchronized. One display must be configured as a server and the others will configure with it. The parameter 9.1 (RS-485 configuration) must be the same for all. RS-485 network There are many configurations possible, only with RS-485 or combining different options this displays offer.
  • Page 22 Sync through a display with GPS Server display Client display • • Sync (Parameter 4.2): 4 Sync (Parameter 4.2): 3 (RS- (GPS). 485). RS-485 network RS-485 network Client display • Sync (Parameter 4.2): 3 (RS- 485). 1660K023G Page 22 of 30...
  • Page 23 Sync though a display with Ethernet connected to a SNTP server. Server display SNTP server • Configure net parameters • Sync: SNTP • Write the server addres in the field. Ethernet network Ethernet network RS-485 network RS-485 network Client display Client display •...

  • Page 24: Response Frame

    Communication with commands through RS-485 The displays can obtain the displayed parameters through commands, as well as force the display time through RS-485 commands. In this case, the display must be configured for not to sync another way or the sync will rewrite the programmed time.
  • Page 25 Display temperature request Frame This frame only includes the code. This does not send any data. Code Address End of block ACII Hexa 50h 54h Example: Request temperature from the display in address 03 Code Address End of block ACII Hexa 50h 54h 30h 33h...
  • Page 26 Display humidity request Frame This frame only includes the code. This does not send any data. Code Address End of block ACII Hexa 50h 54h Example: Request temperature from the display in address 03 Code Address End of block ACII Hexa 50h 54h 30h 33h...
  • Page 27 Displayed CO concentration request Frame This frame only includes the code. This does not send any data. Code Address End of block ACII Hexa 50h 43h Example: Request CO concentration from the display in address 03 Code Address End of block ACII Hexa 50h 43h...
  • Page 28 Annex 2: View the web page remotely The web page of the display is accessible remotely if the router is correctly configured. This is done redirecting an input from the router to the display. User has to enter to the router configuration webpage, in the port redirection tab A new port must be added •...

  • Page 29: Statement Of Conformity

    Severo Ochoa, 80 Polígono Industrial Font del Radium 08403Granollers As the builder of the equipment of the LARTET brand: Model : DC-41SRTHO in all versions. We declare under our sole responsibility that the aforementioned product complies with the following European directives: Directive: LVD 2006/95/CEE Low Voltage Directive.

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