LAUREL LTSE User manual

Model LTSE
ANALOG OUTPUT FROM
MODBUS TCP/IP COMMANDS
OWNERS MANUAL
LAUREL Electronics Inc.
3183-G Airway Ave, Costa Mesa, CA, 92626, USA
el: [phone] Fax: [phone] • Website: www.laurels.com

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1. ORDERING GUIDE, SERIAL INPUT TRANSMITTER
Configure a model number in this format: LTSE60
LTSE6
… Transmitter with Ethernet serial data input, 4-20 mA, 0-20 mA or 0-10 isolated
analog output, and dual 120 mA solid state relays.
Power
0
00
0....................................................................................................... 85-264 ac or 90-300 dc
1
11
1........................................................................................................... 12-30 ac or 10-48 dc
2. TABLE OF CONTENTS
1. ORDERING GUIDE, LTSE SERIAL INPUT TRANSMITTER ................................................. 2
2. TABLE OF CONTENTS ....................................................................................................... 2
3. INTRODUCTION, LTSE ETHERNET INPUT TRANSMITTER ............................................... 3
4. COMPLEMENTARY MANUALS ......................................................................................... 3
5. RECEI ING & UNPACKING YOUR LTSE TRANSMITTER .................................................. 3
6. SAFETY CONSIDERATIONS .............................................................................................. 4
7. LTSE TRANSMITTER FIELD WIRING & JUMPER SETTINGS ............................................ 5
8. SETTING UP YOUR TRANSMITTER WITH IS SOFTWARE ................................................ 6
9. MODBUS COMMANDS FOR LTSE TRANSMITTER............................................................ 13
10. USING DIAGNOSTIC TOOL QMODMASTER ...................................................................... 14
11.
11.11.
11. LTSE TROUBLESHOOTING HINTS .................................................................................... 18
12. SPECIFICATIONS, SERIAL INPUT TRANSMITTER ............................................................ 20
13. WARRANTY ...................................................................................................................... 24

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3. INTRODUCTION, LTSE ETHERNET INPUT TRANSMITTER
The LTSE Ethernet input to analog output trans itter (or Ethernet-to-analog converter) accepts
Modbus TCP/IP commands to generate an isolated, scalable 4-20 mA, 0-20 mA or 0-10 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. Model LTSE60
is normally powered by AC (85-264 ac). Model LTSE61 is powered by low voltage AC or DC
(typically 24 dc).
The analog output can be set by jumpers to current (4-20 mA or 0-20 mA) or voltage output (0-
10 ). The analog output is transformer isolated to avoid ground loops, provides 16-bit reso-
lution of the output span, and is ultra-linear to within one bit. The output is scaled to the serial
input in software. Output accuracy is ±0.02% of span. The factory default setting is 4-20 mA.
Dual solid state relays rated 120 mA at 140 ac or 180 dc are standard. The relays can
respond to the transmitted serial values or to transmitted control characters, which override the
internal setpoints. The relays can also be controlled independently of the serial input by applying
signals to control inputs 1 and 2.
Isolation to 250V r s is provided for power, the Ethernet input, analog output, and relay
outputs. Isolation adds safety and avoids ground loops.
Trans itter setup is via the unit’s Ethernet port using an external PC and our Instrument Setup
(IS) software, which is at no charge.
4. COMPLEMENTAR MANUALS
• Modbus Manual for Counters at https://www.laurels.com/downloadfiles/Modbus-Manual-
CTR.pdf.
• Ethernet Manual at https://www.laurels.com/downloadfiles/ethernet_manual.pdf. Covers
Ethernet Node discovery and setup using Node Manager PC software or Web Server soft-
ware built into each Node. Node Manager software can set up the sending of emails or text
messages either periodically or in the event of an alarm.
5. RECEIVING & UNPACKING OUR TRANSMITTER
Your LTSE transmitter was carefully tested and inspected prior to shipment. Should the trans-
mitter be damaged in shipment, notify the freight carrier immediately. In the event the
transmitter is not configured as ordered or is inoperable, return it to the place of purchase for
repair or replacement. Please include a detailed description of the problem.

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6. SAFET 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. isually inspect the unit for signs of damage. If the
unit is damaged, do not attempt to operate.
Caution:
• This unit may be powered with AC (mains) from 85-264 ac or 90-300 dc with the high
voltage power supply option, or from 12-30 ac or 10-48 dc with the low voltage power
supply option. This transmitter has no AC (mains) switch. It will be in operation as soon as
power is applied.
• The 85-264 ac or 90-300 dc mains connector (P1 Pins 1-3) is colored green to differentiate
it from other input and output connectors. The 12-30 ac or 10-48 dc mains connector is
colored black.
• To avoid dangers of electrocution and/or short circuit, do not attempt to open the case while
the unit is under power. However, signal wiring changes external to the case can be made
safely while the unit is under power.
• To prevent electrical or fire hazard, do not expose the transmitter to excessive moisture.
• Do not operate the transmitter in the presence of flammable gases or fumes. Such an environ-
ment constitutes an explosion hazard.
• Secure the transmitter to a 35 mm DIN rail.
Sy bols used:
Caution (refer to accompanying
documents)
Caution, risk of electric shock.
Equipment protected throughout
by double insulation or reinforced
insulation.
Earth (ground) terminal.
Both direct and alternating current.
Operating environ ent:
• Class II (double insulated) equipment
designed for use in Pollution degree 2.
PROVISION FO
PROVISION FOPROVISION FO
PROVISION FOR
RR
R COOLING
COOLINGCOOLING
COOLING
AL 1
AL 2
RESET
POWER
AL 1
AL 2
RESET
POWER
AL 1
AL 2
RESET
POWER
AL 1
AL 2
RESET
POWER
AL 1
AL 2
RESET
POWER
To avoid overheating, mount transmitters
with ventilation holes at top and bottom.
Leave a minimum of 6 mm (1/4”) between
transmitters, or force air with a fan.

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7. LTSE TRANSMITTER FIELD WIRING & JUMPER SETTINGS
E2 ju pers a + d set the analog output to 4-20 mA or 0-20 mA current (factory default setting).
E2 ju pers b + c set the analog output to 0-10 voltage.
The analog output is sourcing. Do not put an external voltage source in series with
it. Applying an external 24 dc source will burn out the analog output board.
Do not change E1, E3, E4, E6 or E7 ju pers.
HOW TO OPEN & CLOSE THE CASE
The only reason to open the case would be to change the factory default 4-20 mA or 0-20 mA
analog output to 0-10 . 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.

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8. SETTING UP OUR LTSE TRANSMITTER WITH IS SOFTWARE
OVERVIEW
The analog output and relay output functions of an LTSE transmitter are set up initially with
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
proper) that houses the Node.
To set up the analog output, jumpers on the LTSE main board are used to select current output
(4-20 mA or 0-20 mA) or voltage output (0-10 ). Current output is the factory default. To scale
the analog output, the values for the high and low endpoints of the range are entered using IS
software. A variable called “Item 3” is entered via a Modbus command and is compared to the
two endpoints to generate the analog output by linear interpolation.
To set up relay operation, relay setpoints and relay operation modes are programmed into the
LTSE using IS software. For relay operation, the same “Item 3” variable that is used for the
analog output is compared to the setpoints. The relays can also be actuated directly via Modbus
commands, as explained in this manual.
Following initial setup, the endpoints used to generate the analog output and the parameters
used to control relay operation can be changed on the fly using Modbus commands shown in
our Modbus Manual for Counters at https://www.laurels.com/downloadfiles/Modbus-Manual-
CTR.pdf.
INSTALLING INSTRUMENT SETUP (IS) SOFTWARE
Under Windows 7 or 10, set User Account Control (UAC) to “Never Notify” so that IS software
can write files. Use Google for instruction on how to change UAC for your version of Windows.
Turn off and restart your computer. Download IS3_5_4.exe onto your PC from our website.
Double-click on the downloaded file to unzip it into a directory, like C:\temp. Within that
directory, double-click on setup.exe to install the software on your PC. IS software works with
all versions of Windows. If you cannot complete the installation, this may be because of
software firewalls at your company. Please see the troubleshooting section at the back of this
manual. Your executable file will be C:\Program Files(x86)\IS2\Instrument Setup.exe. Copy that
file and paste a shortcut on your Desktop.
ESTABLISHING ETHERNET COMMUNICATIONS
Connect the PC to the LTSE directly via an Ethernet cable, or connect the PC and LTSE via
Ethernet cables into the same Local Area Network. Ethernet cables (CAT5 or better) can be
straight-through or crossover. Our Ethernet Nodes automatically adapt for either. Apply power
to the LTSE, and click on the IS shortcut that you have created in the previous step.

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Following a brief splash screen, IS software will open the Communications screen. Make
selections as shown below, and click on Ethernet .
In the resulting Node Discovery screen, all Laurel Nodes discovered by your PC will be listed.
Highlight the Node that corresponds to your LTSE.

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After highlighting the Node corresponding to your LTSE, click on the Device Discovery tab. Only
the LTSE host of your Node should be listed. Highlight that Device, and press Main Menu .
From the Main Menu screen, press on Counter and on Get to upload the setup program from
your LTSE into your PC. Press on iew then Setup to view the setup parameters of your LTSE.
Available Main Menu tabs will then be displayed. The first tab is Input+Display . Clicking on
Read will allow you to view the latest reading transmitted via Modbus.

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Click on the
Click on the Click on the
Click on the A
AA
Analog Out
nalog Outnalog Out
nalog Out tab
tabtab
tab to scale your analog output. The factory default output is 4-20 mA,
which is set by jumpers as explained previously in this manual. Enter the Lo Range Reading
that is to produce the low analog out, such as 4 mA, and the Hi Range Reading that is to pro-
duce the high analog output, such as 20 mA. This will create the two endpoint values of your
analog output range. Only enter numerical values. The decimal point is ignored.
The analog o
utput is sourcing.
Do not put an external voltage source in series with
it. Applying an external 24 dc source as would be required for a 2-wire transmitter
will burn out the LTSE’s analog output circuit.

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Click on the Relay Alarms 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. For example, temperature alarm or control would be referenced to a
setpoint in °C or °F.
ime
1000
Digital Reading
Setpoint
OFF OFF
ON
ime
1000 Setpoint OFF
ONON
Digital Reading
Active High Basic Alarm Active Low Basic Alarm
A basic alar changes state automatically when the reading rises above a specified limit, and
changes back automatically when the reading falls below that limit. A red LED indicates the
relay is in an alarm condition, which can be active high or active low, as programmed.

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ime
Reading
1050
950 Pass
Fail
Fail
ime
1050
Setpoint = 1000
Hysteresis value = 50
Heater
OFF
Reading
ON ON ON
OFF OFF
950
Setpoint = 1000
Deviation value = 50
1000 1000 Pass
Hysteresis Band Alarm Deviation Band Alarm
A hysteresis band alar controls relay action symmetrically around a setpoint. The relay
closes (or opens) when the reading goes above the setpoint plus one hysteresis value, and
opens (or closes) when the reading falls below the setpoint less one hysteresis value. A narrow
hysteresis can be used to minimize relay chatter. A wide hysteresis band can be used for on-off
control applications.
A deviation band alar controls relay action symmetrically around a setpoint. The relay
actuates when the reading falls within the deviation band, and de-actuates when the reading
falls outside. 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.
Click on the Communications tab to set the Modbus TCP/IP address of your LTSE,

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To download your entries from your PC into your LTSE, click on Main Menu . From the Main
Menu
screen, click on the Counter tab and do a Put Setup . This will download your setup file
from the PC into your LTSE. Then exit IS software completely. Your LTSE will then be ready to
convert Modbus commands to analog outputs and relay outputs.
Your IS setup file can also be saved to disk using the IS File menu, and setup files can be
retrieved from disk using the IS File menu. The factory default setup file for the LTSE is named
LTSE6x.CT2.
IS SOFTWARE COMMAND MODE
IS software has a Command Mode, which allows values to be sent to “Item 3”, so that the LTSE
can output a specific analog current from 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”
will cause 20 mA to be output. Pressing “Item 3” under READINGS will read back the Item 3
value of 10000 counts. The IS software Command Mode works with Ethernet and TCP/IP. It is
an easy way to test system operation. To enter the Command Mode, press “Commands” in the
top menu bar of IS software.

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9. MODBUS COMMANDS FOR THE LTSE
1. GENERAL
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,” including the following:
1. Change scale and offset or coordinates of 2 points parameters to generate the analog
output derived from Item 3.
2. Change setpoints to control relay action derived from Item 3.
3. Force relay action regardless of Item 3
4. Reset latched alarms by forcing a Function Reset.
See our Modbus Manual for Counters at https://www.laurels.com/downloadfiles/Modbus-
Manual-CTR.pdf for a Modbus TCP/IP overview and for all available Modbus commands, not
just those for the LTSE. In particular, see the long section entitled, “FC03 (READ) & FC10
(WRITE) HOLDING REGISTER ADDRESSES.” Use Hi Word starting Register Addresses and an
even number of Registers. The Register Addresses shown in this section apply to both FC03
and FC10, and are for Modbus numbering systems that start at 00 01 (Base 1). Subtract 1
from each Register Address for Modbus numbering systems that start at 00 00 (Base 0).
To write values to Item 3 with Base1 addressing, write the Hi Word applied to Item3 to hex
register address 006
006006
006C
CC
C, and the Lo Word applied to Item3 to hex register address 006
006006
006D
DD
D. With
Base 0 addressing, the Hi Word address becomes 006B
006B006B
006B, and the Lo Word address becomes
006C
006C006C
006C. The qModMaster example on the next page illustrates how to use Base 0 addressing to
generate 4, 12 and 20 mA analog outputs.

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10. USING DIAGNOSTIC TOOL QMODMASTER
1. ABOUT QMODMASTER
qModMaster.exe is a freeware Windows program which allows a PC to serve as a Modbus
Master. It is an easy-to-use tool to verify communications, send requests to Modbus Slaves,
and view their responses. qModMaster works well with Base 0, but not with Base 1, so use it
only with Base 0 and subtract 1 from the Register addresses listed in our Modbus Manual for
Counters. For more information, see the qModMaster section of our Modbus Manual for
Counters at https://www.laurels.com/downloadfiles/Modbus-Manual-CTR.pdf.
Download qModMaster from SourceForge at:
https://sourceforge.net/projects/qmodmaster/files/latest/download
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.
2. EXAMPLE: USE MODBUS COMMANDS TO OUTPUT 4, 12 OR 20 MA
The task is to configure qModMaster to generate analog outputs of 4, 12 and 20 mA. This
assumes that Instrument Setup (IS) software has already been used to set up the analog
output as 4-20 mA with an Item 3 Lo Range Reading (for 0 mA) of +000000 and an Item 3 Hi
Range Reading (for 20 mA) of +010000. These decimal values of 0, 5000 and 10000 form 32
bit hex values of 0000 0000, 0000 1388 and 0000 2710.
Launch qModMaster. A screen of the type shown below will appears. Under iew , press Bus
Monitor
. Under Options , select Modbus TCP . Make entries as shown. Note that that the entry
in counts to be sent to Item 3 can be in Hex or Dec formats. Under Commands , press Connect
to make the data connection. The Bus Monitor should show Tx and Rx “values written
correctly.” For information on these values, please see our Modbus Manual for Counters at
https://www.laurels.com/downloadfiles/Modbus-Manual-CTR.pdf.
An external panel meter or multimeter connected to the analog output should show the desired
output currents.

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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
0101
01 to holding register 0x006. This turns Relay1 on.
Then Alarm2 is forced by writing 03
0303
03 to holding register 0x006. This turns Relay2 on.
Both relays are turned off by writing 00
0000
00 to holding register 0x006. The setup for this last
command is seen in the qModMaster window.
The Bus Monitor window displays the result of all three write commands.

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.

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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. Power down and restart your computer for the UAC
change to take effect. Following installation of IS software, you may return UAC to its previous
setting.
Inability to open the IS Software Main Menu for a discovered and highlighted Device is most
often caused by a Windows Defender firewall, which prevents IS software executable components
from running and results in a variety of error messages. To open the firewall of your version of
Windows for IS software, enter “firewall” into the search field of the MS Windows icon in the
lower left of your monitor. Or click on “Windows Firewall” from the Windows Control Panel.
Follow the links and ensure that Instrument Setup and its executable .exe components are
allowed. With normal IS installation, the executable IS files are listed in the directory C:\Program
Files (x86)\IS2 and are as follows:
• Ctr5T.exe
• CtrW.exe
• DPM5T.exe
• DPMW.exe
• Instrument Setup.exe
• WT5T.EXE
• WtW.exe
Firewall issues can also be caused by third-party firewall and antivirus protection software like
McAfee or Norton. Do a Google search on how to change such third-party firewall settings to
allow our specific software to run.
The IT departments of large companies often set tight firewall rules. If you suspect a firewall issue
and work for a large company, call in an IT representative for help.
Inability to open the IS Software Main Menu can also be caused by the factory default choice of
Custom ASCII protocol. That protocol works great with RS232, RS485 or USB, but not with
Ethernet, which requires Modbus TCP/IP. Modbus RTU is seamlessly converted to Modbus
TCP/IP and back by our Nodes.
If your Laureate is a panel meter or counter that was set to Custom ASCII, the easiest way to
change it to Modbus is from the front panel by setting the menu item “Ser 4” to 010.
If your Laureate is an LTE or LTE transmitter that was set to Custom ASCII, you can change it to
Modbus with Node Manager software or IS software. With IS software:

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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,” highlight your Device, and press “Main Menu.”
5. In the Main Menu, press “Counter” or “DPM” in the top menu bar depending on your Device,
and press “Get Setup.”
6. In the resulting IS software main screen, press “ iew” and then “Setup.”
7. Press the “Communication” tab and verify that “Serial Protocol” is set to “Modbus RTU.” If
not, set it to “Modbus RTU,” click on “Main Menu,” and execute a “Put” to download your
Modbus RTU selection into your Device.
Get and Put co ands will not work as expected when multiple copies of IS software are running
on your PC. Ensure that only one copy of IS software is active on your PC at the same time.
As an aid to diagnostics, the Ethernet connector for all of our Ethernet Nodes is provided by an
RJ45 jack, where green and amber LEDs on the jack indicate network operation:
1) Following power-up, the green and amber LEDs are on steady until an IP address has been
assigned to the Node.
2) Once an IP address has been assigned to the Node, the
amber LED is turned off. It will light up whenever the Node
detects data packet activity.
3) When the Node has made a TCP connection, the green LED
alternates on (1 sec) and off (1 sec), while the amber LED
is on steady.
Ethernet cables (CAT5 or better) can be straight-through or crossover. Our Ethernet Nodes
automatically adapt for either.
Ethernet Indicators
8
7
6
5
4
3
2
1
Amber LED
Green LED
RX -
RX +
X -
X +

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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 0-10
oltage or Current Selection ....................................................................................... ia jumpers
Compliance at 20 mA .................................................................................. 12 (0-600 ohm load)
Compliance at 10 ......................................................................... 2 mA (5 kohm minimum load)
Output Resolution ....................................................................................... 16 bits (65,535 steps)
Output Error ................................................................................................... < 0.02% of full span
Output Update Rate, Max .......................................................... Approx 10/sec max at 9600 baud
Dual Relay Output (standard)
Relay Type .................................................. Two solid state relays, SPST, normally open, Form A
Load rating ................................................................................... 120 mA at 140 ac or 180 dc
Relay modes ............... Active high or low, latching or non-latching, hysteresis or band deviation
Power & Electrical
Power to Transmitter .................................... 95-240 ac ±10% or 90-300 dc (standard power)
.................................................................... 12-30 ac or 10-48 dc (low voltage power option)
Power Isolation .................. 250 rms between power, analog output, signal input, and serial I/O
Trans itter Setup
Ethernet Node Discovery ....................................................... Node Manager Software in host PC
Transmitter Setup .............................................................. Instrument Setup Software in host PC
Mechanical
Case Dimensions ......................................................................................... 129 x 104 x 22.5 mm
Case Mounting ................................................................................ 35 mm DIN rail per EN 50022
Electrical Connections............................................................. Detachable screw plug connectors
En
EnEn
Environmental
vironmentalvironmental
vironmental
Operating Temperature ............................................................................................... 0°C to 55°C
Storage Temperature ............................................................................................... -40°C to 85°C
Relative Humidity ........................................................... 95% from 0°C to 40°C, non-condensing