Summary of Contents for Land Instruments International SPOT
- Page 1 SPOT USER GUIDE PUBLICATION N 809557 LANGUAGE: ENGLISH SPOT MODBUS CONTROLS Q U A L I T Y C U S T O M E R S O L U T I O N S...
- Page 2 Observe precautions for handling electrostatic discharge sensitive devices. Equipment Operation Use of this instrument in a manner not specified by Land Instruments International may be hazardous. Read and understand the user documentation supplied before installing and operating the equipment. The safety of any system incorporating this equipment is the responsibility of the assembler.
- Page 3 Design and Manufacturing Standards The Quality Management System of Land Instruments International is approved to BS EN ISO 9001 for the design, manufacture and on-site servicing of combustion, environmental monitoring and non-contact temperature measuring instrumentation.
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Page 4: Table Of Contents
User Guide Spot Modbus Controls Contents Modbus TCP Communication with a SPOT Thermometer Examples Get Latest Temperature Log Temperatures at High Speed Set Emissivity Capture a JPEG from the Instrument 2.5 Switch the LED on and off (firmware v10 onwards) - Page 5 MODBUS TCP COMMUNICATION...
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Page 6: Modbus Tcp Communication With A Spot Thermometer
User Guide Spot Modbus Controls Modbus TCP Communication with a SPOT Thermometer The SPOT thermometer functions as a Modbus slave. To communicate with a SPOT thermometer, your device must be configured as a Modbus master. Your device’s IP address must be compatible with, but not the same as, that of the SPOT thermometer. Setting up a compatible IP address is explained fully in Section 2.6 of the SPOT Thermometer User Guide. - Page 7 Modbus writes should only be performed when necessary. Every time new values are written to registers highlighted in orange, the settings are saved to flash. There is a finite limit of typically 100,000 writes to flash memory before PCB failure. Items highlighted in yellow are activated in V8 firmware onwards. Items highlighted in green are activated in V10 firmware onwards. Items highlighted in blue are activated in V15 firmware onwards. Modbus Name Type Bytes Bits Default Permitted Range Access Notes address (16 bit) 1 lo Firmware version 1 hi Display version Current focal distance 300 - 10000 mm Current IP address Any 8 digit hex 5 lo Requests - set the 5.
- Page 8 Modbus Name Type Bytes Bits Default Permitted Range Access Notes address (16 bit) 14 lo Flash rate 1 - 30 flashes per sec- 14 hi Display booleans 7 set IP 0x81 0 = OHCP, 1 = Set IP 6 Use back- 0=off, 1=on ground correction 5 Automatic 0=off, 1=on calculation of background tem-...
- Page 9 Modbus Name Type Bytes Bits Default Permitted Range Access Notes address (16 bit) 25 lo AlarmMode booleans 3 High target 2 Low target 1 High ambient 0 Low ambient 25 hi TimeMode booleans 7 Limiter mode 0 = Hold, 1 = Reset 6 Use limiter 0 = Don’t use, 1 = Use 5 Peak Picker...
- Page 10 Modbus Name Type Bytes Bits Default Permitted Range Access Notes address (16 bit) 213 lo Watchdog Toggles between 0 or 1 Provides a 'keepalive' signal 0 and 1 every s 213 hi reserved Limiter low limit Limiter high limit 216 lo IOX Input mode 0 = CMD In not used 1=CMD In used for...
- Page 11 Modbus Name Type Bytes Bits Default Permitted Range Access Notes address (16 bit) 246 lo Status 3 High target alarm active 2 Low target alarm active 1 High ambient alarm active 0 Low ambient alarm active 246 hi jpeg control 1 New jpeg data 1 when written, 0 when See Examples is available...
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Page 12: Examples
EXAMPLES... -
Page 13: Get Latest Temperature
(247, 1) Temperature = Array[0] 2.2 Log Temperatures at High Speed SPOT thermometers can provide temperature measurement at up to 1 kHz if instrument output time is set to 1 ms. The output data buffer permits every 1 ms measurement to be recorded and transmitted in a single large batch of data. -
Page 14: Set Emissivity
User Guide Spot Modbus Controls Longer read intervals risk loss of data, particularly on a Windows platform where timer scheduling is not absolute. //Logging code called on a timer, interval of 50*output time is recommended Array = ModbusRead (254,101) // Read the buffer pointer and the whole... -
Page 15: Capture A Jpeg From The Instrument
Spot Modbus Controls User Guide 2.4 Capture a JPEG from the Instrument JPEGs are transmitted by the instrument copying data to a buffer within the Modbus registers, then the PC software reading it. If bit 1 of the requests byte is set, the instrument will set bit 0 of the jpeg control byte to indicate that jpeg capture is active then capture an image. It will then repeatedly: •... -
Page 16: Switch The Led On And Off (Firmware V10 Onwards)
User Guide Spot Modbus Controls 2.5 Switch the LED on and off (firmware v10 onwards) To switch the LED on remotely, you need to set bit 2 of register 134. If you are not using sample and hold or the peak picker, use command:... - Page 17 The following Land Instruments International products are provided with an 18 months warranty: • SPOT Actuator 12 MONTHS WARRANTY All Land Instruments International products not provided with either a 36, 24 or 18 month warranty (see lists above), are provided with a 12 months warranty.
- Page 18 • inappropriate recalibration which results in product calibration being taken outside specification. • improper resealing of thermometer following parameter adjustment (UNO, FLT5/A, etc.). • attempted repair by a non-Land-authorised repair centre. Land Instruments International Ltd • Dronfield S18 1DJ •...
- Page 19 For a full list of international offices, please visit our website www.landinst.com Copyright © 2008-18 LAND Instruments International. Continuous product development may make it necessary to change these details without notice. SPOT Modbus Controls User Guide, Issue 8, 6 June 2018...