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5. Modbus

The probe can be accessed using the Modbus serial communication protocol. The supported

Modbus variant is Modbus RTU (Serial Modbus) over RS-485 interface.

The pre-configured default Modbus serial settings are presented in the following table.

Modbus communication settings can also be configured using Vaisala Insight PC software.

For a description of MGP260 Modbus registers, see 

Modbus registers (page 70)

.

Table 7 Default Modbus serial communication settings

Description

Default value

Serial bit rate

19200

Parity

N

Number of data bits

8

Number of stop bits

2

Modbus device address

240

More information

‣

Configuring Modbus communication settings with Insight (page 39)

‣

Modbus registers (page 70)

MGP260 User Guide

M212504EN-A

38

陕西威瑞仪器仪表有限公司 生产代理销售：实验检测设备 气象科学仪器设备

Tel:029-88186182 Web:www.xavery.cn Email:[email protected]

Summary of Contents for MGP260 Series

Page 1: ...M212504EN A User Guide MGP260 Series Multigas Probes for Methane Carbon Dioxide and Humidity Measurement MGP260 Tel 029 88186182 Web www xavery cn Email sxvery 163 com...

Page 2: ...uous cases the English versions are applicable not the translations The contents of this document are subject to change without prior notice Local rules and regulations may vary and they shall take pr...

Page 3: ...P 20 3 1 2 Installation preparations 20 3 1 3 Installation option ball valve installation 21 3 1 4 Installation option flow through adapter installation 22 3 1 5 MGP260 dimensions 24 3 1 6 Recommended...

Page 4: ...og pressure or temperature sensor 47 8 Calibration 49 8 1 Calibration recommendations 49 8 2 Calibration overview 49 8 2 1 Compensation mode during calibration 50 8 2 2 Flow through adapter 50 8 3 Cal...

Page 5: ...t data registers 70 A 1 2 Configuration registers 72 A 1 3 Status registers 82 A 1 4 Device identification objects 85 Maintenance and calibration 87 Warranty 87 Technical support 87 Recycling 87 Table...

Page 6: ...ain menu and settings 37 Figure 16 Modbus communication settings in Insight PC software 39 Figure 17 Analog output configuration options in insight 40 Figure 18 Unit Selection in Insight 41 Figure 19...

Page 7: ...Table 9 Inputs and outputs 64 Table 10 Compliance 64 Table 11 Operating environment 65 Table 12 Mechanical specification 65 Table 13 Options and accessories 65 Table 14 Modbus measurement data registe...

Page 8: ...MGP260 User Guide M212504EN A 6 Tel 029 88186182 Web www xavery cn Email sxvery 163 com...

Page 9: ...al Installation and Safety Guide languages English Japanese Chinese M212538EN MGP260 Series USB Service Cable 257295 Quick Guide M212539EN MGP260 Series Flow through adapter 258877 Quick Guide M212540...

Page 10: ...OCAP are registered trademarks of Vaisala Oyj All other product or company names that may be mentioned in this publication are trade names trademarks or registered trademarks of their respective owner...

Page 11: ...utput options include 3 analog current output channels 4 20 mA and Modbus RTU over RS 485 The probes also provide a 4 20 mA Ex ia input for connecting an optional external pressure or temperature sens...

Page 12: ...w point temperature Dew point and frost point temperature 0 25 vol 10 60 C 14 140 F 2 2 3 Wet basis and dry basis measurement output MGP260 methane carbon dioxide and water vapor measurements can be s...

Page 13: ...de 257295 With the Insight software you can Calibrate and adjust the measurement See device information and status See real time measurement Configure serial communication settings analog input and ou...

Page 14: ...ess wiring terminals 4 Tightening nut only tighten from the tightening nut when installing wrench size 50 mm 1 97 in 5 1 5 male NPT thread never install to any other thread type than 1 5 female NPT th...

Page 15: ...tional Ex ia external pressure or temperature sensor input terminal 3 M20x1 5 wiring lead through with removable plastic transport cover fold sides of transport cover together and pull out Wiring opti...

Page 16: ...a band pass filter One set of optics measures humidity and carbon dioxide and a second one measures methane The measurement consists of two steps first the FPI is electrically tuned so that its pass...

Page 17: ...surement cuvette 1 Mirror 2 Light absorbed by the measured gases 3 Sensor chips under TO5 packages see items 4 8 4 Hermetic window 5 Thermopile detector 6 Hermetic window 7 Fabry P rot interferometer...

Page 18: ...owing classifications Table 4 MGP260 series hazardous area classifications Certification MGP260 classification IECEx international ATEX EU Ex II 1 2 1 G Ex eb mb ia IIB T3 Ga Gb 40 C Tamb 60 C MET US...

Page 19: ...optional intrinsically safe Ex ia external pressure or temperature sensor input terminal must be kept separate from the analog output power supply input and RS 485 wiring See the wiring instructions i...

Page 20: ...nsic safe IIB output parameters Parameter Value Uo 25 2 V Io 78 mA Po 0 5 W Um 40 V Co 820 nF Lo 20 mH The parameters listed in Table 6 page 18 apply when one of the two conditions below is given the...

Page 21: ...rea Remove the probe from the process for configuration and use only the Vaisala accessory PC connection cable to connect the probe to Insight Maintenance The probe filter is the only user replaceable...

Page 22: ...or MGP260 comes shipped with an NPT 1 5 male thread test plug Vaisala order code 257525SP If you are uncertain about the thread type of the process connector you want to install MGP260 into use the th...

Page 23: ...f the probe can have sharp edges To avoid injury when touching the threads wear protective gloves The probe can cause a foot injury if dropped To avoid foot injuries wear protective shoes More informa...

Page 24: ...5 terminals on the component board 4 1 5 male NPT thread on MGP260 never install to any other thread type than 1 5 female NPT 5 For best results install MGP260 horizontally and position the tip of the...

Page 25: ...s 3 Probe gland tightening nut 4 Probe gland locknut do not turn 5 Gas tube inlet port G 1 8 on the other side of the adapter 6 Gas tube outlet port G 1 8 More information Attaching flow through adapt...

Page 26: ...the recommended installation position for MGP260 Install the probe in a straight run of pipeline 5 pipe diameters downstream of the closest bend or other feature affecting gas flow and 2 pipe diamete...

Page 27: ...monitor the safety of the area you are working in After installation use a gas detector to ensure that process connections are leak free WARNING To avoid compromising the leak tightness of the install...

Page 28: ...an M16x1 5 gland for the optional external sensor input wiring Ex ia Use 1 or 2 M20x1 5 glands for wiring the 4 20 mA analog output power supply input and RS 485 terminals as required in your applica...

Page 29: ...port can tear the PTFE tape Only adjust the position of the probe in the installation port by tightening rotating clockwise CAUTION 2 Open the captive screws on the connection box flange with a 5 mm...

Page 30: ...tput and power supply wiring as required in your application Figure 13 page 30 shows an example of wiring the device when all inputs and outputs are used 1 Optional external pressure or temperature se...

Page 31: ...2 See Finalizing installation page 31 for instructions on attaching grounding to the probe grounding terminal Chapter 3 Installation 29 Tel 029 88186182 Web www xavery cn Email sxvery 163 com...

Page 32: ...4 20 mA Ex ia INPUT SHIELD RS 485 Iout1 Iout2 Iout3Iin 18 30 VDC POWER SUPPLY FOR ANALOG OUTPUTS 18 30 VDC POWER SUPPLY FOR PROBE GROUNDING TERMINAL GROUNDING RAIL FOR POSSIBLE UNUSED WIRES INTERNALL...

Page 33: ...htening nut with a 50 mm 1 97 in wrench 2 Connect the MGP260 grounding terminal to the grounding rail of the installation site with a 4 mm2 wire 3 Ball valve installations only lock the handle of the...

Page 34: ...h the probe into the adapter until the shoulder of the probe head meets the slot inside the adapter and stops The probe filter should cover both the inlet and outlet ports from the inside Check the in...

Page 35: ...mounting alignment is incorrect and must be adjusted 90 Ensure the adapter mounting does not pull the probe out of a straight angle If the mounting pulls the probe to the side the leak tightness of t...

Page 36: ...295 More information Connecting to Insight software page 35 Insight main view page 37 Configuring Modbus communication settings with Insight page 39 Configuring analog outputs with Insight page 40 Con...

Page 37: ...explosion hazardous area Remove the probe from the process for configuration and use only the Vaisala accessory PC connection cable 257295 to connect the probe to Insight CAUTION Vin Vin D D GND RS 4...

Page 38: ...Vaisala USB Device with a COM port number in brackets the cable is ready for use Take note of the COM port number for later use If the device is listed as Vaisala USB Instrument Cable without a COM po...

Page 39: ...2 Select Settings to switch between the Basic Mode and Advanced Mode user modes change the units of parameters metric non metric enter a factory code to access restricted functionalities or view infor...

Page 40: ...onfigured using Vaisala Insight PC software For a description of MGP260 Modbus registers see Modbus registers page 70 Table 7 Default Modbus serial communication settings Description Default value Ser...

Page 41: ...bits and stop bits Response delay To configure the Modbus communication settings with Insight 1 Connect to Insight and select Configure Device Communication 2 Enter the communication values as needed...

Page 42: ...alog outputs with Modbus The Modbus implementation of MGP260 includes configuration registers for analog output measurement parameter selection scaling and error output level For a description of MGP2...

Page 43: ...h Save and exit with Close 5 Repeat the configuration for each output analog outputs 1 2 and 3 as required More information Wet basis and dry basis measurement parameters page 42 6 4 Changing units in...

Page 44: ...when ordering the probe and can be configured with Vaisala Insight PC software or Modbus The following formula shows the conversion between wet basis and dry basis values X dry X wet 100 H2O where X...

Page 45: ...or environmental compensation is configured on the order form when ordering the probe and can later be updated using Vaisala Insight PC software or Modbus protocol 7 1 1 Temperature compensation MGP26...

Page 46: ...implementation of MGP260 includes configuration registers for pressure and temperature compensation setpoints You can also configure the temperature and pressure compensation mode External Setpoint M...

Page 47: ...nly and Off 4 Analog input 1 configure the input from the external pressure or temperature sensor used when the pressure or temperature compensation mode is set as External 1 Connect to Insight see Co...

Page 48: ...ore the setting by selecting Save 7 3 2 Using probe measurement as temperature compensation To set the internal temperature measurement of the probe as the temperature compensation source 1 Select Con...

Page 49: ...nalog input 1 menu The Input mode and Input parameter selections are set automatically based on the external compensation parameter selection Figure 21 Analog input 1 configuration menu in Insight 1 I...

Page 50: ...4 Store the setting with Save MGP260 User Guide M212504EN A 48 Tel 029 88186182 Web www xavery cn Email sxvery 163 com...

Page 51: ...nsight see Connecting to Insight software page 35 To feed reference gases to MGP260 in a controlled manner when calibrating and adjusting use a flow through adapter An MGP260 flow through adapter is a...

Page 52: ...in the Compensation setpoints tab of the calibration menu When you exit calibration mode the values you have entered in the Compensation setpoints tab remain in use as the current setpoint values but...

Page 53: ...locknut locked to the threads with Loctite threadlocker do not rotate 5 Gas tube inlet and outlet ports G 1 8 on opposite sides of the adapter body For instructions on attaching the flow through adap...

Page 54: ...end adjustment in 2 point adjustments 4 Compensation setpoint configuration for the calibration and adjustment environment 5 Methane CH4 measurement adjustment tab In 2 point adjustments use this tab...

Page 55: ...adjustment points 1 Zero point adjustment tab adjust the zero signal low end reference point 0 for both CH4 and CO2 using nitrogen 2 CH adjustment tab adjust the high end reference point 60 for CH4 u...

Page 56: ...it until Insight displays a notification about successful zero point adjustment activation The adjustment typically takes 2 3 minutes 5 The zero point adjustment is saved automatically after it has be...

Page 57: ...abilization time or unsuitable calibration setup a If you want to apply the adjustment you have made select Activate adjustment b To exit without taking the adjustment in use select Close 8 After comp...

Page 58: ...adjustment you have made select Activate adjustment b To exit without taking the adjustment in use select Close 8 After completing the adjustment update the information in the Calibration information...

Page 59: ...e difference between the reference and the measured value Very large differences may be due to insufficient stabilization time or unsuitable calibration setup a If you want to apply the adjustment you...

Page 60: ...r package window If the window is visibly broken the probe must not be used CAUTION If the probe needs to be sent to Vaisala for maintenance or repairs see the following instructions Removing probe fr...

Page 61: ...process WARNING While installing or uninstalling the device there is a risk of flammable gas release or flame entrance WARNING Exposure to hazardous gases for example hydrogen sulfide H2S is possible...

Page 62: ...on the area you prepared for handling the probe Hold the probe from the connection box when handling it and avoid touching the parts that have been inserted into the process Use a cloth or similar to...

Page 63: ...efore packing it See the instructions in Sending probe to Vaisala page 61 9 5 Sending probe to Vaisala If you need to return the probe for maintenance or replacement contact Vaisala technical support...

Page 64: ...port When packing the probe for shipping ensure that you use sufficient padding the probe has dried completely after cleaning and that the probe is tightly sealed in a plastic bag MGP260 User Guide M2...

Page 65: ...ol at 60 vol 0 3 vol at 40 vol 0 1 vol at 10 vol Temperature dependence Compensated 0 100 vol 0 1 of reading C Compensated 0 100 vol 0 1 of reading C Compensated 0 25 vol 0 1 of reading C Uncompensate...

Page 66: ...4 20 mA scalable isolated Analog output load Minimum 0 Maximum 500 Analog output accuracy 0 2 of full scale at 25 C 77 F Analog output temperature dependence 0 005 C 0 003 F full scale Analog input o...

Page 67: ...n Property Specification Weight 3 kg 6 6 lb Thread type 1 5 male NPT Cable lead throughs 1 x M16x1 5 2 x M20x1 5 Materials Probe body AISI316L stainless steel PPS Filter cap Sintered PTFE Table 13 Opt...

Page 68: ...sions are given in millimeters and inches 430 16 92 130 5 1 198 7 8 G 1 8 55 21 7 76 29 9 186 1 mm 7 32 Distance at correct installation depth mm in Figure 27 Flow through adapter dimensions with MGP2...

Page 69: ...n NPT 1 5 40 1 57 68 2 67 403 15 87 34 1 34 30 1 18 1 85 47 210 8 27 193 7 6 16 5 0 65 94 3 7 28 1 1 155 6 1 414 16 3 248 9 76 50 1 97 5 3 16 Figure 29 MGP260 dimensions in millimeters and inches Chap...

Page 70: ...ment mirror optical borosilicate glass class BK7 6 Filter cap PTFE polytetrafluoroethylene porous solid structure 10 5 Recycling instructions These recycling instructions guide you on the end of life...

Page 71: ...tic and rubber parts that can be removed for recycling Figure 30 page 69 highlights the metal parts connection box metal barrier strain relief plates and screws plastic parts filter and cuvette and th...

Page 72: ...data is returned instead An exception is generated only for any access outside the applicable register ranges A 1 1 Measurement data registers Table 14 Modbus measurement data registers read only Regi...

Page 73: ...bit integer ppmv 100 parts per ten thousand 259 0102hex Carbon dioxide CO2 concentration 16 bit integer ppmv 100 parts per ten thousand 260 0103hex Carbon dioxide CO2 concentration dry basis 16 bit i...

Page 74: ...304hex Volatile pressure compensation value cleared at probe reset 32 bit float hPa Range 450 1550 hPa Init default 1013 25 775 0306hex Volatile temperature compensation value cleared at probe reset 3...

Page 75: ...6 bit integer Valid range 0 1000 1541 0604hex Restart device Function Analog output 1 1794 0701hex Analog output 1 measurement parameter selection When written scalings are reset Reg 0000hex CH4 wet b...

Page 76: ...meters 0000hex CH4 wet basis 0002hex CH4 dry basis 0004hex CO2 wet basis 0006hex CO2 dry basis Minimum 0 Maximum 1000000 Output parameters 0008hex H2O wet basis 000Ahex H2O dry basis Minimum 0 Maximum...

Page 77: ...002hex CH4 dry basis 0004hex CO2 wet basis 0006hex CO2 dry basis Minimum 0 Maximum 1000000 Output parameters 0008hex H2O wet basis 000Ahex H2O dry basis Minimum 0 Maximum 250000 Output parameters 000C...

Page 78: ...scalings are reset Reg 0000hex CH4 wet basis 0002hex CH4 dry basis 0004hex CO2 wet basis 0006hex CO2 dry basis 0008hex H2O wet basis 000Ahex H2O dry basis 000Chex Td 000Ehex Tdf See Table 14 page 70...

Page 79: ...ameters 0000hex CH4 wet basis 0002hex CH4 dry basis 0004hex CO2 wet basis 0006hex CO2 dry basis Minimum 0 Maximum 1000000 Output parameters 0008hex H2O wet basis 000Ahex H2O dry basis Minimum 0 Maximu...

Page 80: ...02hex CH4 dry basis 0004hex CO2 wet basis 0006hex CO2 dry basis Minimum 0 Maximum 1000000 Output parameters 0008hex H2O wet basis 000Ahex H2O dry basis Minimum 0 Maximum 250000 Output parameters 000Ch...

Page 81: ...n scalings are reset Reg 0000hex CH4 wet basis 0002hex CH4 dry basis 0004hex CO2 wet basis 0006hex CO2 dry basis 0008hex H2O wet basis 000Ahex H2O dry basis 000Chex Td 000Ehex Tdf See Table 14 page 70...

Page 82: ...meters 0000hex CH4 wet basis 0002hex CH4 dry basis 0004hex CO2 wet basis 0006hex CO2 dry basis Minimum 0 Maximum 1000000 Output parameters 0008hex H2O wet basis 000Ahex H2O dry basis Minimum 0 Maximum...

Page 83: ...put parameters 0008hex H2O wet basis 000Ahex H2O dry basis Minimum 0 Maximum 250000 Output parameters 000Chex Td 000Ehex Tdf Minimum 10 Maximum 60 2311 0906hex Error output level mA Float Min 0 5 mA M...

Page 84: ...mum 20 000 0206hex temperature Minimum 200 Maximum 400 2567 0A06hex Input value read only Float A 1 3 Status registers Table 16 Modbus status data registers read only Register number decimal Address h...

Page 85: ...ement status 16 bit signed integer 527 020Ehex Ts measurement status 16 bit signed integer 528 020Fhex Device status 16 bit signed integer 0000hex Critical failure 0001hex Error 0002hex Warning 0003he...

Page 86: ...ror Error 0027hex Supply power insufficient for analog input Error 0028hex Analog input 1 out of range Error 0030hex Internal temperature error Error 0031hex Supply power insufficient for operation Er...

Page 87: ...le contents 0 00hex VendorName Vaisala 1 01hex ProductCode MGP261 2 02hex MajorMinorVersion Software version for example 1 2 3 3 03hex VendorUrl http www vaisala com 4 04hex ProductName Vaisala Multig...

Page 88: ...Tel 029 88186182 Web www xavery cn Email sxvery 163 com...

Page 89: ...normal wear and tear exceptional operating conditions negligent handling or installation or unauthorized modifications Please see the applicable supply contract or Conditions of Sale for details of th...

Page 90: ...Tel 029 88186182 Web www xavery cn Email sxvery 163 com...

Page 91: ...Tel 029 88186182 Web www xavery cn Email sxvery 163 com...

Page 92: ...www vaisala com Tel 029 88186182 Web www xavery cn Email sxvery 163 com...

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