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Summary of Contents for LAUREL LTSE
- Page 1 Model LTSE ANALOG OUTPUT FROM MODBUS TCP/IP COMMANDS OWNERS MANUAL LAUREL Electronics Inc. 3183-G Airway Ave, Costa Mesa, CA, 92626, USA Tel: (714) 434-6131 Fax: (714) 434-3766 • Website: www.laurels.com...
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Page 2: Table Of Contents
COMPLEMENTARY MANUALS ..................3 RECEIVING & UNPACKING YOUR LTSE TRANSMITTER ..........3 SAFETY CONSIDERATIONS ....................4 LTSE TRANSMITTER FIELD WIRING & JUMPER SETTINGS ..........5 SETTING UP YOUR TRANSMITTER WITH IS SOFTWARE ..........6 MODBUS COMMANDS FOR LTSE TRANSMITTER............13 USING DIAGNOSTIC TOOL QMODMASTER .............. -
Page 3: Introduction, Ltse Ethernet Input Transmitter
Modbus TCP/IP commands to generate an isolated, scalable 4-20 mA, 0-20 mA or 0-10V analog output. The LTSE utilizes an Ethernet counter transmitter main board, but no signal conditioner board. It is factory set to the Modbus TCP protocol. Unlike the LTS serial-to-analog converter, it does not work with the Custom ASCII protocol, which supports data streaming. -
Page 4: Safety Considerations
6. SAFETY CONSIDERATIONS Warning: Use of this transmitter in a manner other than specified may impair the protection of the device and subject the user to a hazard. Visually inspect the unit for signs of damage. If the unit is damaged, do not attempt to operate. Caution: •... -
Page 5: Ltse Transmitter Field Wiring & Jumper Settings
The only reason to open the case would be to change the factory default 4-20 mA or 0-20 mA analog output to 0-10V. To open the case, remove the four screws at the LTSE corners. When closing the case, make sure that the ventilation grills are properly aligned. -
Page 6: Setting Up Your Transmitter With Is Software
Laurel’s free Instrument Setup (IS) software, a Windows-based application that runs on a PC. For setup, the LTSE can be connected to the PC via a direct Ethernet connection, or the LTSE can be plugged into the same LAN as the PC. The IS software running on the PC will discover the LTSE’s Ethernet Node (or Ethernet chip) and the host Device (or the LTSE transmitter... - Page 7 Following a brief splash screen, IS software will open the screen. Make Ethernet selections as shown below, and click on Node Discovery In the resulting screen, all Laurel Nodes discovered by your PC will be listed. Highlight the Node that corresponds to your LTSE. - 7 -...
- Page 8 Device Discovery After highlighting the Node corresponding to your LTSE, click on the tab. Only Main Menu the LTSE host of your Node should be listed. Highlight that Device, and press Main Menu Counter From the screen, press on and on...
- Page 9 The analog output is sourcing. Do not put an external voltage source in series with it. Applying an external 24 Vdc source as would be required for a 2-wire transmitter will burn out the LTSE’s analog output circuit. - 9 -...
- Page 10 Relay Alarms Click on the tab to set up the LTSE’s two solid state relays, which are standard. The two relays can operate in a basic alarm mode, in a hysteresis band mode, or in a deviation band mode, as explained below. Setpoint operation is referenced to the digital reading that is received as serial data.
- Page 11 A deviation value (such as 50 counts) is set up around both sides of the setpoint to create the deviation band. Passbands around a setpoint are often used for component testing. Communications Click on the tab to set the Modbus TCP/IP address of your LTSE, - 11 -...
- Page 12 4 to 20 mA or activate relays. For example, if the LTSE has been set up to output 4 mA when Item 3 is 0 counts and 20 mA when Item 3 is 10000 counts, entering a value of 10000 under REMOTE DISPLAY and pressing “Item 3 Only”...
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Page 13: Modbus Commands For Ltse Transmitter
Most Modbus commands will be used to load values into the variable named “Item 3”, which is then be used by the LTSE for analog output and for setpoint comparisons for relay action. Modbus commands are also available to overwrite setup parameters entered with IS Software “on the fly,”... -
Page 14: Using Diagnostic Tool Qmodmaster
Click on the downloaded file and install it in a directory of your choice. Create a desktop icon from the installed executable. Before using qModMaster, ensure that your LTSE transmitter has been set to Modbus RTU as explained in the Instrument Setup (IS) software section of this manual. - Page 15 - 15 -...
- Page 16 3. EXAMPLE: USE MODBUS COMMANDS TO CONTROL TWO RELAYS Using BASE 0 addressing, alarm relays are controlled by writing to holding register 0x006F. Bit 0 controls Relay 1. Bit 1 controls Relay 2. First Alarm1 is forced by writing 01 01 01 01 to holding register 0x006. This turns Relay1 on. Then Alarm2 is forced by writing 03 03 03 03 to holding register 0x006.
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Page 18: Ltse Troubleshooting Hints
11. LTSE TROUBLESHOOTING HINTS Inability to install IS software is most often due to User Account Control (UAC), a Windows security feature. To allow IS software installation, first set UAC of your version of Windows to "Never notify" so that the installation can create directories. Use Google for instructions on how to change UAC with your version of Windows. - Page 19 1. In the “Communication” screen, select “Custom ASCII” and “Transmitter LTE, LTSE.” 2. Press “Ethernet.” 3. In the resulting “Node Discovery” screen, highlight your Node and press “Device Discovery.” 4. In the resulting “Device Discovery” screen, checkmark “Force discovered devices to Node’s Settings,”...
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Page 20: Specifications, Serial Input Transmitter
12. SPECIFICATIONS, LTSE ETHERNET -TO-SERIAL CONVERTER Ethernet Data Input Serial protocols ......................Modbus TCP Serial connector ........................RJ45 Data rates ......................300 to 9600 baud Analog Output (standard) Output Levels ..................0-20 mA, 4-20 mA or 0-10V Voltage or Current Selection ..................Via jumpers Compliance at 20 mA .................. -
Page 21: Warranty
In the event of a defect during the warranty period, the defective unit may be returned to the seller, which may be Laurel or a Laurel distributor. The seller may then repair or replace the defective unit at its option. In the event of such a return, freight charges from the buyer shall be paid by the buyer, and freight charges from the seller shall be paid by the seller.
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