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Related Manuals for LAUREL LTS6
Summary of Contents for LAUREL LTS6
- Page 1 Model LTS6 RS232 OR RS485 SERIAL INPUT, ANALOG OUTPUT TRANSMITTER Modbus or Custom ASCII Protocol 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
1. ORDERING GUIDE, SERIAL INPUT TRANSMITTER Configure a model number in this format: LTS60, CBL04 LTS6…Transmitter with 4-20 mA, 0-20 mA, ACCESSORIES 0-10V or -10V to +10V isolated analog CBL04……RS232 cable, two 3-pin connec- output, RS232 or RS485 serial data... -
Page 3: Introduction, Serial Input Transmitter
3. INTRODUCTION, RS232 OR RS485 SERIAL INPUT TRANSMITTER The LTS6 serial input to analog output transmitter (or serial-to-analog converter) accepts RS232 or RS485 serial data using the Modbus or Custom ASCII protocol, and converts it to an isolated, scalable 4-20 mA, 0-20 mA, 0-10V or -10V to +10V analog output. The unit fits on a 35 mm DIN rail and is only 22.5 mm (0.89") thick. -
Page 4: Safety Considerations
5. 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: Transmitter Field Wiring
6. TRANSMITTER FIELD WIRING - 5 -... -
Page 6: Programming Your Transmitter
7. PROGRAMMING YOUR TRANSMITTER OVERVIEW Serial input transmitters are programmed using a PC with an RS232 port and Instrument Setup (IS) software, which provides a graphical user interface. The software allows uploading, editing, downloading and saving of setup data. CONNECTING TO YOUR PC Use a 3-wire RS232 cable (P/N CBL04) to connect your transmitter to the COM port of your PC. - Page 7 9600 as the Baud Rate. You will be able to change your protocol and baud rate later under the Communication setup tab. Click on Establish, and the two fields at the bottom of the screen should turn green and display your communication parameters and the counter-transmitter revision level.
- Page 8 SETTING UP BASIC OPERATION Under the Input+Display tab, select 000.00 Secs for Time Out. Ignore Signal Input, Gate Time, Filter, and Power-On Total, as these parameters do not apply to the serial input transmitter. Under Display, select Remote A, Remote S or Remote C. These items correspond to the Remote A, Remote S and Remote C operating modes, which are explained under the “Custom ASCII Protocol Transmitter Communications”...
- Page 9 SETTING UP RELAY ALARMS OPERATION Under the Relay Alarms tab, enter the Setpoint 1 and 2 values as well as other parameters applicable to relay operation. Set Alarm Source to Item 3 as illustrated. Please see the “Dual Relay Operation” section of this manual for an explanation of the relay operating modes. - 9 -...
- Page 10 SETTING UP COMMUNICATIONS (REMOTE A & S MODES) The above screen will appear under the Communication tab if Remote A or Remote S has been selected as Display Type under the Input+Display tab. These two modes are not able to extract data from an ASCII string that contains multiple data values and non-numeric characters.
- Page 11 SETTING UP COMMUNICATIONS (REMOTE C MODE) The above screen will appear under the Communication tab if Remote C has been selected as Display Type under the Input+Display tab. This mode is able to extract data from an ASCII string that contains multiple data values and non- numeric characters.
- Page 12 LTS6 out of the Remote C mode back into the Remote A mode. In that case you will need to reset the LTS6 to Remote C and do a Put Setup to download your setup from the PC into the LTS6.
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Page 13: Changing Jumper Settings
8. CHANGING JUMPER SETTINGS Serial Signal Duplex Jumpers Termination Resistor* E6 a = Transmit Full None E6 c = Receive RS485 Half E6 b + d** E6 c RS232 Full None None The termination resistor jumper settings should only be selected if the transmitter is the last device on an RS485 line longer than 200 feet (60 m). - Page 14 WHEN TO CHANGE JUMPERS Your transmitter case does not need to be opened if jumpers have already been set by your distributor. Otherwise you will need to open the case and either set jumpers or verify that the factory default jumpers positions will meet your needs. The selection serial signal (RS232 or RS485) can be achieved by jumpers on the main board or by external wiring, as documented on the previous page.
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Page 15: Dual Relay Operation
9. DUAL RELAY OPERATION The optional dual solid state 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. - Page 16 A deviation band alarm 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.
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Page 17: Modbus Protocol Transmitter Communications
10. MODBUS PROTOCOL TRANSMITTER COMMUNICATIONS 1. GENERAL The Modbus capability conforms to the Modbus over Serial Line Specification & Implemen- tation guide, V1.0. Both the Modbus RTU and Modbus ASCII protocols are implemented: Modbus RTU Baud Rate ... 300, 600, 1200, 2400, 4800, 9600 or 19200 Data Format .. - Page 18 4. COMMUNICATIONS SETUP Parameters selectable via Instrument Setup software, distributed on CD ROM: Serial Protocol ....... Custom ASCII, Modbus RTU, Modbus ASCII Modbus ASCII Gap Timeout ... 1 sec, 3 sec, 5 sec, 10 sec Baud Rate ........300, 600, 1200, 2400, 4800, 9600, 19200 Parity ..........
- Page 19 Modbus ASCII Format Byte Number Action Request Response Request Response - 19 -...
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Page 20: Custom Ascii Protocol Transmitter Communications
11. CUSTOM ASCII PROTOCOL TRANSMITTER COMMUNICATIONS All setup parameters are entered into the transmitter via Instrument Setup (IS) software, including the serial communication format, digital address, operating mode, analog output scaling, and relay operating modes and setpoints. 1. SERIAL COMMUNICATION FORMAT The Custom ASCII serial communication format for both RS232 and RS485 is the following: Modes .... - Page 21 Remote A is an addressable input mode that uses the K command letter. It can convert remote data on one or more transmitters having the command address in a multi-point configuration or a single transmitter having the command address in a point-to-point configuration. Remote S is not addressable, and data representing a value to be retransmitted as an analog output is received via a point-to-point connection.
- Page 22 = Decimal point (optional). = Alarm Character (optional). A = no alarms, B = alarm 1 active, C = alarm 2 active, D = alarms 1 & 2 active. <CR> = Carriage return character Remote S Data Format: SDDDDDD.A<CR> = Sign of value (optional), space (or +) for positive, - for negative value. = Data.
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Page 23: Specifications, Serial Input Transmitter
12. SPECIFICATIONS, SERIAL INPUT TRANSMITTER Serial Data Input Signal Levels ........RS232, full-duplex RS485, half-duplex RS485 (selectable) Protocol ......... Modbus RTU, Modbus ASCII, Custom ASCII (software selectable) Serial Connector ................ Detachable dual 3-position plugs Analog Output (standard) Output Levels ..................0-20 mA, 4-20 mA or 0-10V Voltage or Current Selection .................. -
Page 24: Warranty
In the event of a defect during the warranty period, the unit should be returned, freight prepaid (and all duties and taxes) by the Buyer, to the authorized Laurel distributor where the unit was purchased. The distributor, at its option, will repair or replace the defective unit. The unit will be returned to the buyer with freight charges prepaid by the distributor.