The Modbus Organization
Modbus Protocol Software
User Manual for LSI LASTEM models including: PRPMA4100, PRPMA4100 Soil Particle Deposit Sensor, Soil Particle Deposit Sensor, Particle Deposit Sensor, Deposit Sensor, Sensor
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DocumentDocumentEnvironmental monitoring solutions Soil particle deposit sensor User manual Soil particle deposit sensor User manual Table of contents 1 Product overview .......................................................................................................................................3 2 Unpacking...................................................................................................................................................3 3 Configuration..............................................................................................................................................4 3.1 Accessing the Web-Based User Interface ........................................................................................ 4 3.2 Configuration Steps.......................................................................................................................... 5 3.2.1 Wi-Fi Password ............................................................................................................................ 5 3.2.2 IP Address, Subnet Mask, and Gateway ...................................................................................... 5 3.2.3 Setting Modbus RTU Settings ...................................................................................................... 5 3.2.4 Checking Status............................................................................................................................ 5 3.3 Checking Communication ................................................................................................................ 5 4 Wiring .........................................................................................................................................................6 4.1 Power ............................................................................................................................................... 6 4.2 Cable Assemblies.............................................................................................................................. 6 4.3 Protecting Unused Wires ................................................................................................................. 7 5 Mounting ....................................................................................................................................................8 5.1 Mounting Requirements .................................................................................................................. 8 5.2 Dimensions..................................................................................................................................... 10 5.3 Mounting Accessories .................................................................................................................... 11 5.3.1 Standard Mounting Plate........................................................................................................... 11 5.3.2 Bottom Mount Configuration .................................................................................................... 12 5.3.3 Bottom Mount Configuration .................................................................................................... 13 5.3.4 Tube Mount Configuration ........................................................................................................ 14 6 Modbus.....................................................................................................................................................15 7 Troubleshooting .......................................................................................................................................16 8 Specifications............................................................................................................................................16 LSI LASTEM SRL INSTUM_05672 Page 2 / 16 Soil particle deposit sensor User manual 1 Product overview The PRPMA4100 Soiling Sensor provides simplified measurement of soiling losses for PV installations. It detects accumulated soiling particles on a soil collection window using an internal camera. The units require no water, have no moving parts, are compact and easy to install, and do not require site-specific dust calibration or technician cleaning visits. They are suitable for a wide range of PV installations. The unit has a single M12 user connection port. Use this M12 power and RS-485 port to power your unit and record data via Modbus RTU over RS-485. The unit's aluminum enclosure provides for various mounting options. Soil collection window IP 67 Note: M12 Power & RS-485 Modbus RTU Figure 1: PRPMA4100 Soiling Sensor. Side and bottom mount option Some photos and drawings in this document show the original version with an additional M12 connector port. 2 Unpacking Figure 2 shows the unit with its shipping box and included accessories. Each unit includes a U-shaped Standard Mounting Plate pre-attached in the bottom-mount configuration. Remove any protective film covering the soiling collection window. LSI LASTEM SRL Certificate Soiling sensor Figure 2: Unpacking the PRPMA4100. INSTUM_05672 Standard Mounting Plate Page 3 / 16 Soil particle deposit sensor User manual 3 Configuration 3.1 Accessing the Web-Based User Interface To configure settings described in this User Manual, use Wi-Fi to connect your smartphone or laptop PC to the devices' web-based user interface. To access the web-based user interface: · Power on the unit. The unit's soil collection window will light up for a short time and then will go dark. · Wait 1-2 minutes for the device to start it's Wi-Fi network for configuration. · On your smartphone or laptop PC, use the network selection interface to select your unit's Wi-Fi network. Your unit's SSID (network name) and password are reported on the Certificate. If asked, select your PC to be non-discoverable. · Launch a web browser, such as Chrome, Firefox, or Edge. · Enter the default IP address of 10.244.69.66 in the brower's URL field. · You will then see the unit web interface. Figure 3: Web-based user interface Note: Note: The Wi-Fi network will automatically disable after 60 minutes since power-up. This is a security feature. If needed, cycle power to the unit to regain access to the configuration screen. The default Wi-Fi password may be changed by the user. If the password has been changed and is unknown, contact LSI Lastem. LSI LASTEM SRL INSTUM_05672 Page 4 / 16 Soil particle deposit sensor User manual 3.2 Configuration Steps 3.2.1 Wi-Fi Password You may change your unit's Wi-Fi network password if desired by using the Wifi password fields in the SETTINGS section of the user interface. After entering a new password, press the orange "Update" button to save it to the device. Cycle power to the device to make the new password take effect. Reconnect following the instructions in section 3.3 to verify the password is set. Note: If the password has been changed and is unknown, contact LSI Lastem. 3.2.2 IP Address, Subnet Mask, and Gateway These settings cannot be changed on the unit model referenced in this document. 3.2.3 Setting Modbus RTU Settings Configure the Modbus RTU settings for data logging over RS-485. Modbus Node Address · The unit's default node address for Modbus RTU is 1. · To change the node address, enter the new address using the web interface (Figure 3-3), then press "Update". · Node addresses from 1 to 247 are allowed. Baud Rate and Data Format · From the web interface you may also select the serial communication parameters for baud rate and data format. · Supported baud rates are 9600, 19200, 38400, 57600, and 115200. The default is 9600. · Supported data formats are 8-N-1, 8-N-2, 8-E-1, and 8-O-1. The default is 8-N-1. · To change the settings, select the new values and press "Update". 3.2.4 Checking Status Check the Status field on the web user interface (Figure 3) and confirm it reads "Normal". If an error condition is shown, confirm all configuration settings. If the error persists, contact LSI Lastem for support. The "Device Message" portion of the web user interface will indicate current operations of the unit, including checking sky brightness, waiting, and acquiring data. Note: Upon initial shipment, the Transmission Loss and Soiling Ratio fields will read the last measured values recorded during factory test; these will correspond to clean glass with near 0 loss. These fields will update once the unit is deployed outdoors in its installation location overnight. 3.3 Checking Communication For checking Modbus communication use the Modpoll third-party software. Below the command for query the first 2 values with the sensor connected to the PC Com1: LSI LASTEM SRL INSTUM_05672 Page 5 / 16 Soil particle deposit sensor User manual modpoll.exe -a 1 -r 1 -c 2 -t 4:float -b 9600 -p none -l 1000 com1 And here the answer: modpoll 3.4 - FieldTalk(tm) Modbus(R) Master Simulator Copyright (c) 2002-2013 proconX Pty Ltd Visit http://www.modbusdriver.com for Modbus libraries and tools. Protocol configuration: Modbus RTU Slave configuration...: address = 1, start reference = 1, count = 2 Communication.........: com1, 9600, 8, 1, none, t/o 1.00 s, poll rate 1000 ms Data type.............: 32-bit float, output (holding) register table -- Polling slave... (Ctrl-C to stop) [1]: 0.00238 [3]: 0.99676 -- Polling slave... (Ctrl-C to stop) [1]: 0.00238 [3]: 0.99676 -- Polling slave... (Ctrl-C to stop) ... Note: Reading a value of NAN for Transmission Loss and Soiling Ratio is not a communication error condition. This value confirms that communication is correct but indicates that a measurement value is not available. The measurement value should update once the unit is deployed outdoors in its installation location overnight. 4 Wiring 4.1 Power The unit requires 10-30 VDC and draws 3 W of average power. However, it may draw up to 6 W on a transient basis. 4.2 Cable Assemblies CCCFA0500 is the cable for connecting PRPMA4100 sensor. Figure 4 shows the wire colors for the M12 power and RS-485 cable. Note: Note: When using long power cables, voltage drop along the cable can be significant. Use 15 V DC power supply voltage to compensate. CCCFA0500 cable include an additional wire not used for the product. LSI LASTEM SRL INSTUM_05672 Page 6 / 16 25 m (CCCFA0500) Soil particle deposit sensor User manual Brown: 1030 VDC White: Blue: RS-485 B No connect Ø 6 mm Figure 4: Wire colors for M12 power & RS-485 cable. Shield / Ground Note: Use only the supplied connectors or cable assemblies. Although other connectors may appear to fit, use of non-approved components may result in water penetration WARNING: Check all wiring before turning on power. Incorrect wiring may damage the unit and/or your other equipment. 4.3 Protecting Unused Wires Protect any unused wires from accidental contact by cutting to unequal lengths, folding back, and insulating, as shown in Figure 5. Insulate Figure 5: Protecting unused wires from accidental contact. LSI LASTEM SRL INSTUM_05672 Page 7 / 16 Soil particle deposit sensor User manual 5 Mounting 5.1 Mounting Requirements Mount the unit in the plane of array of your PV modules, choosing a location where the unit will have a clear view of the sky within a cone at least 30 from the normal, as shown in Figure 6. Figure 6: Mounting requirements and view of sky. To mount the unit, use the 6 threaded mounting holes on the enclosure, shown in Figure 7, or use the 4 mounting holes on the standard mounting plate, as shown in Figure 10. To minimize the potential for water entry to the sealed housings, always mount the unit with the cables facing down or to the side, as shown in Figure 8, and never with the cables facing up. See Figure 9 for dimensions. LSI LASTEM SRL INSTUM_05672 Page 8 / 16 2X Mounting Holes Soil particle deposit sensor User manual 4X Mounting Holes 2X Mounting Holes Side View Bottom View Figure 7: Mounting holes. Side View Figure 8: Mount with cables down or to the side. LSI LASTEM SRL INSTUM_05672 Page 9 / 16 5.2 Dimensions Soil particle deposit sensor User manual Bottom View Side View Figure 9: PRPMA4100 dimensions. LSI LASTEM SRL INSTUM_05672 Page 10 / 16 Soil particle deposit sensor User manual 5.3 Mounting Accessories 5.3.1 Standard Mounting Plate The standard mounting plate accessory, shown in Figure 10, is shipped with every Unit. It can be mounted in 4 orientations on the bottom of the enclosure and 2 orientations on either side of the enclosure. The plate will be pre-mounted to the Unit; remove and reposition it as desired. Figure 10: Standard mounting plate dimensions. LSI LASTEM SRL INSTUM_05672 Page 11 / 16 Soil particle deposit sensor User manual 5.3.2 Bottom Mount Configuration The bottom mount configuration of the standard mounting plate, shown in Figure 11, enables the user to mount the Unit on surfaces parallel to the plane of array. Top View Figure 11: Bottom mount configuration. LSI LASTEM SRL INSTUM_05672 Page 12 / 16 Soil particle deposit sensor User manual 5.3.3 Bottom Mount Configuration The side mount configuration of the standard mounting plate, shown in Figure 12, enables the user to mount the unit on surfaces at a right angle to the plane of array. Figure 12: Side mount configuration. Side View LSI LASTEM SRL INSTUM_05672 Page 13 / 16 Soil particle deposit sensor User manual 5.3.4 Tube Mount Configuration The tube mount configuration of the standard mounting plate, shown in Figure 13, enables the user to mount the Unit on tubes for meteorological station applications. Note: Note that options for U bolts are pictured but any U bolts are to be provided by the user. Fits tubes with outer diameters of 1.3 to 1.7" Figure 13: Tube mount configuration. LSI LASTEM SRL INSTUM_05672 Page 14 / 16 Soil particle deposit sensor User manual 6 Modbus Table 6-1 lists the registers available for your client software to read data from the Unit. Each numbered register in the table is a 16-bit (2-byte) register. Parameters requiring more than two bytes must be read from sequential registers as indicated by the Register Start and Register End columns. For a 4byte value with bytes in the order ABCD, from most to least significant, the first register reads out bytes AB and the second reads out bytes CD. For detailed information on Modbus protocols, please reference the specifications published by Modbus.org. Note: Note: On some user data acquisition devices, it is necessary to add 1 to all the register values shown in Table 1 to determine the Modbus address. Recommended parameters for Modbus communication are scan period 1 s, timeout 500 ms, delay between polls 30 ms. Do not poll the unit more than once per second. Using shorter timeouts may result in communication errors. Register Start 1 3 207 217 225 228 501 503 Register End 2 4 216 224 225 233 502 503 Parameter Transmission Loss Soiling Ratio Part Number Serial Number Software Version Calibration Date Uptime Status Code Data Type Float(1) Float(1) Char x 10 Bytes Notes 4 Fractional loss of transmission due to soiling particles 4 1 - Transmission Loss 20 String: 10 registers, 1 char each Char x 8 16 String: 8 registers, 1 char each Uint16 2 Software version number Uint16 x 6 12 6 registers: Y, M, D, H, M, S Uint32 4 Seconds Uint16 2 0 = Normal Table 1: Modbus map. LSI LASTEM SRL INSTUM_05672 Page 15 / 16 Soil particle deposit sensor User manual 7 Troubleshooting Issue · Wi-Fi network not found during configuration attempt · Wi-Fi password forgotten · Modbus communication for logging unsuccessful · Soiling ratio values out of expected range Solutions · Confirm the unit is powered and has been on for less than 60 minutes. · Cycle power if needed to restart. Confirm window lights up for a short time and then turns dark. · Follow connection procedure (see chapter 3.1). · Contact LSI Lastem Support. · Confirm Modbus register numbers (see chapter 6). · Verify whether register addresses require +1 offset for your client device. · Confirm byte order (see chapter 6). · Confirm timeouts and polling rate. · Confirm Unit is installed outdoors in desired plane of array with clear view of sky (see chapter 5). · Allow Unit to operate through at least one sunset and night and check the readings the next day. · If needed, visually inspect unit for damage or fouling. 8 Specifications General Enclosure Cables Model name Part number Ambient working temperature Input power Power consumption Transmission loss accuracy Local dust calibration Communication protocols Material Outdoor rating Dimensions Weight Mounting Power & RS-485 Soiling Sensor PRPMA4100 -20 to 60 °C 10 to 30 VDC 3 W average (up to 6 W transient) ±1% Not required Modbus RTU (RS-485) Anodized aluminum housing IP67 4.53 x 4.53 x 3.86 in. / 115.0 x 115.0 x 98.1 mm without connectors and mounting plate 3.27 lbs. / 1.48 kg 6 mounting holes, M5 x 0.8, 10 mm thread depth Standard mounting plate accessory: 4 mounting holes (two slots), dia. 0.33 in. / 8.5 mm Shielded, weather resistant, UV-rated 24 awg / 0.2 mm2 M12 circular connector, IP67 LSI LASTEM SRL INSTUM_05672 Page 16 / 16