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Vega VEGAPULS C 21 Operating Instructions Manual

Radar sensor for continuous level measurement
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Operating Instructions
Radar sensor for continuous level
measurement
VEGAPULS C 21
Modbus and Levelmaster protocol
Document ID: 58343

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  • Page 1 Operating Instructions Radar sensor for continuous level measurement VEGAPULS C 21 Modbus and Levelmaster protocol Document ID: 58343...

  • Page 2: Table Of Contents

    Setup with PC/notebook (interface adapter) ..............24 Connect the PC ......................24 Parameter adjustment with PACTware ................24 Saving the parameterisation data ................... 25 10 Menu overview ........................26 11 Diagnostics and servicing ....................28 VEGAPULS C 21 • Modbus and Levelmaster protocol...
  • Page 3 14.5 Levelmaster commands ....................47 14.6 Configuration of typical Modbus hosts ................50 14.7 Dimensions ........................53 14.8 Industrial property rights ....................54 14.9 Hash function acc. to mbed TLS ..................54 14.10 Trademark ........................54 Editing status: 2019-10-10 VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 4: About This Document

    Symbols used Document ID This symbol on the front page of this instruction refers to the Docu- ment ID. By entering the Document ID on www.vega.com you will reach the document download. Information, note, tip: This symbol indicates helpful additional infor- mation and tips for successful work.

  • Page 5: For Your Safety

    During work on and with the device, the required personal protective equipment must always be worn. Appropriate use VEGAPULS C 21 is a sensor for continuous level measurement. You can find detailed information about the area of application in chapter "Product description". Operational reliability is ensured only if the instrument is properly used according to the specifications in the operating instructions manual as well as possible supplementary instructions.

  • Page 6: Eu Conformity

    USA and Canada. Safety instructions for Ex areas For Ex applications, only devices with corresponding Ex approval may be used. Observe the Ex-specific safety instructions. These are an integral part of the operating instructions and are enclosed with every device with Ex approval. VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 7: Product Description

    Fig. 1: Components of VEGAPULS C 21 Radar antenna 2 Process fitting Electronics housing Mounting thread Connection cable Type label You can find the type label on the sensor housing as well as on the type label support on the connection cable. The type label contains the most important data for identification and use of the instrument. VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 8: Principle Of Operation

    Principle of operation Application area VEGAPULS C 21 is a radar sensor for continuous level measurement. It is suitable for liquids and solids in virtually all industries, particularly in the water and waste water industry.

  • Page 9: Packaging, Transport And Storage

    Transport Transport must be carried out in due consideration of the notes on the transport packaging. Nonobservance of these instructions can cause damage to the device. VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 10: Accessories

    Mounting accessories The mounting accessories include e.g. bracket and mounting bracket and are used for stable mounting of the sensor at the measuring point. The parts are available in various versions and sizes. VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 11: Mounting

    Mounting bracket For a rigid mounting, a mounting bracket with opening for thread G1½, e.g. from the VEGA product range, is recommended. The mounting of the sensor in the bracket is carried out via a G1½ counter nut of plastic. Take note of chapter "Mounting instructions" for the recommended distance to the wall.
  • Page 12 In vessels with conical bottom it can be advantageous to mount the sensor in the centre of the vessel, as measurement is then possible down to the bottom. Fig. 8: Mounting of the radar sensor on vessels with conical bottom VEGAPULS C 21 • Modbus and Levelmaster protocol...
  • Page 13 (0.2 in) out of the socket. Fig. 11: Recommended threaded socket mounting of VEGAPULS C 21 If the reflective properties of the medium are good, you can mount VEGAPULS C 21 on sockets longer than the antenna. The socket end should be smooth and burr-free, if possible also rounded. Note: When mounting on longer sockets, we recommend carrying out a false signal suppression (see chapter "Parameter adjustment").
  • Page 14 Small, inclined sheet metal baffles above the installations scatter the radar signals and prevent direct interfering reflections. Fig. 13: Cover flat, large-area profiles with deflectors Sensor orientation In liquids, direct the sensor as perpendicular as possible to the prod- uct surface to achieve optimum measurement results. Fig. 14: Alignment in liquids VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 15: Measurement Setup - Flow

    Detailed project planning data can be found at the channel manufac- turers and in the technical literature. The measurement can be individually configured for the respective flume via a PC/notebook and PACTware/DTM.The measurement can be individually configured for the respective flume via a PC/notebook and PACTware/DTM. The following examples serve as an overview for flow measurement. At smaller distances the measuring accuracy is reduced, see Technical data. VEGAPULS C 21 • Modbus and Levelmaster protocol...
  • Page 16 Rectangular overfall 3 ... 4 h 90° 90° Fig. 16: Flow measurement with rectangular flume: h = max. filling of the max. rectangular flume 1 Overflow orifice (side view) Headwater Tailwater 4 Overfall orifice (view from tailwater) Khafagi-Venturi flume 3 ... 4 x h 90° Fig. 17: Flow measurement with Khafagi-Venturi flume: h = max. filling of the max. flume; B = tightest constriction in the flume Position sensor 2 Venturi flume VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 17: Connecting To Power Supply

    Wire assignment, con- nection cable Fig. 18: Wire assignment in permanently connected connection cable Wire colour Function Polarity Brown Voltage supply Blue Voltage supply White Modbus signal D- Black Modbus signal D+ Shielding VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 18: Access Protection

    The device code is also stored in the adjustment tool. However, it must be re-entered for each unlocking. When using the VEGA Tools app, the stored device code is then suggested to the user for unlocking.
  • Page 19 "Emergency codes". If this document is lost, the emergency device unlock code can be retrieved from your VEGA contact person after legitimation. The storage and transmission of the device codes is always encrypted (SHA 256 algorithm).

  • Page 20: Setup With Smartphone/Tablet (Bluetooth)

    Play Store" or "Baidu Store" to your smartphone or tablet. Connecting Connecting … Start the VEGA Tools app and select the function "Setup". The smart- phone/tablet searches automatically for Bluetooth-capable instru- ments in the area. The message "Searching …" is displayed.

  • Page 21: Parameter Adjustment

    Menu item display The selected menu item can be recognized by the colour change. Fig. 20: Example of an app view - Setup sensor adjustment Enter the requested parameters and confirm via the keyboard or the editing field. The settings are then active in the sensor. Close the app to terminate connection. VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 22: Setup With Pc/Notebook (Bluetooth)

    Older systems do not always have an integrated Bluetooth LE. In these cases, a Bluetooth USB adapter is required. Activate the Bluetooth USB adapter via the VEGA project assistant (see supplementary instructions "Bluetooth USB adapter"). After activating the integrated Bluetooth or the Bluetooth USB adapt- er, devices with Bluetooth are found and created in the project tree.

  • Page 23: Parameter Adjustment

    (DTM) according to FDT standard are required. The latest PACTware version as well as all available DTMs are compiled in a DTM Collec- tion. The DTMs can also be integrated into other frame applications according to FDT standard. Fig. 22: Example of a DTM view - Setup, sensor adjustment VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 24: Setup With Pc/Notebook (Interface Adapter)

    Further setup steps are described in the operating instructions manu- al "DTM Collection/PACTware" attached to each DTM Collection and which can also be downloaded from the Internet. Detailed descrip- tions are available in the online help of PACTware and the DTMs. VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 25: Saving The Parameterisation Data

    CD from the agency serving you. Saving the parameterisation data We recommend documenting or saving the parameterisation data via PACTware. That way the data are available for multiple use or service purposes. VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 26: Menu Overview

    Filling height Backlight Access protection Bluetooth access code Protection of the parameteri- Deactivated zation False signal sup- False signal suppression pression Sounded distance to the me- dium Reset Delivery status, basic settings VEGAPULS C 21 • Modbus and Levelmaster protocol...
  • Page 27 Sensor character- Sensor features from order text istics Simulation Measured value Simulation value Measured value Indication measured value mem- memory (DTM) ory from DTM VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 28: Diagnostics And Servicing

    • Checking the output signal • Treatment of measurement errors A smartphone/tablet with the VEGA Tools app or a PC/notebook with the software PACTware and the suitable DTM offer you further com- prehensive diagnostic possibilities. In many cases, the causes can be determined in this way and the faults eliminated.

  • Page 29: Status Messages According To Ne 107

    This status message is inactive by default. Maintenance: Due to external influences, the instrument function is limited. The measurement is affected, but the measured value is still valid. Plan in maintenance for the instrument because a failure is expected in the near future (e.g. due to buildup). This status message is inactive by default. VEGAPULS C 21 • Modbus and Levelmaster protocol...
  • Page 30 Wait for the automatic end after 60 mins. Out of specification Code Cause Rectification Text message S600 Temperature of the electronics in the non- Check ambient temperature specified range Impermissible electron- Insulate electronics ics temperature VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 31: Treatment Of Measurement Errors

    The tables below give typical examples of application-related meas- urement errors. The images in column "Error description" show the actual level as a dashed line and the output level as a solid line. VEGAPULS C 21 • Modbus and Levelmaster protocol...
  • Page 32 Remove contamination on the antenna In case of interferences due to instal- lations in the close range, change polarisation direction Create a new false signal suppression Adapt max. adjustment VEGAPULS C 21 • Modbus and Levelmaster protocol...
  • Page 33 Carry out false signal suppression or in- radically towards 100 % on the antenna crease false signal suppression in the during emptying close range by editing With bulk solids, use radar sensor with purging air connection time VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 34: Software Update

    Attach the completed form and, if need be, also a safety data sheet outside on the packaging • Ask the agency serving you to get the address for the return ship- ment. You can find the agency on our homepage. VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 35: Dismount

    12.2 Disposal The device is made of recyclable materials. For this reason, it should be disposed of by a specialist recycling company. Observe the ap- plicable national regulations. VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 36: Certificates And Approvals

    That is why we have introduced an environment management system with the goal of continuously improving company environmental pro- tection. The environment management system is certified according to DIN EN ISO 14001. Please help us fulfil this obligation by observing the environmental instructions in this manual: • Chapter "Packaging, transport and storage" • Chapter "Disposal" VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 37: Supplement

    The antenna edge is also the reference plane for the measurement. Fig. 26: Data of the input variable Reference plane Measured variable, max. measuring range Max. measuring range 15 m (49.21 ft) Depending on application and medium VEGAPULS C 21 • Modbus and Levelmaster protocol...
  • Page 38 - 2 mm (- 0.0787 in) 0,25 m (0.8202 ft) - 10 mm (- 0.3937 in) Fig. 27: Deviation under reference conditions Antenna edge, reference plane Recommended measuring range With bulk solids Already included in the meas. deviation VEGAPULS C 21 • Modbus and Levelmaster protocol...
  • Page 39 0.5 mm² (AWG 20) Ʋ Min. bending radius (at 25 °C/77 °F) 25 mm (0.984 in) Ʋ Diameter approx. 6 mm (0.236 in) Time span after a sudden distance change from 1 m to 5 m until the output signal reaches 90 % of the final value for the first time (IEC 61298-2). Valid with operating voltage U ≥ 24 V DC. Outside the specified beam angle, the energy level of the radar signal is 50% (-3 dB) less. EIRP: Equivalent Isotropic Radiated Power VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 40: Basics Modbus

    1200 m. The bus must be terminated on both sides at the last bus participant with a terminating resistor of 120 Ohm. The resistor is already integrated in the VEGAPULS C 21 and is activated/deactivated via a slide switch. Depending on the local conditions...
  • Page 41 14 Supplement Fig. 28: Bus architecture Modbus Connection resistor Bus participant Voltage supply Protocol description The VEGAPULS C 21 is suitable for connection to the following RTUs with Modbus RTU or ASCII protocol. Protocol ABB Totalflow Modbus RTU, ASCII Bristol ControlWaveMicro...

  • Page 42: Modbus Register

    (4 bytes) according to IEEE 754 are transmitted with individually selectable order of the data bytes (byte transmission order). This "Byte transmission order" is determined in the parameter "Format Code". Hence the RTU knows the registers of the VEGAPULS C 21 which must be contacted for the variables and status information.
  • Page 43 Primary Variable in Byte Order BACD (Middle Endian) 2204 DWord Secondary Variable in Byte Order BACD (Middle Endian) 2206 DWord Third Variable in Byte Order BACD (Middle Endian) 2208 DWord Quarternary Variable in Byte Order BACD (Middle Endian) VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 44: Modbus Rtu Commands

    Parameter Length Code/Data Request: Function Code 1 Byte 0x04 Start Address 2 Bytes 0x0000 to 0xFFFF Number of Registers N*2 Bytes 1 to 127 (0x7D) VEGAPULS C 21 • Modbus and Levelmaster protocol...
  • Page 45 With this function code, several holding registers can be writen. Only registers can be written in an enquiry which are immediately consecutive. If there are gaps (registers do not exist) between the registers, then they cannot be written in a telegram. VEGAPULS C 21 • Modbus and Levelmaster protocol...
  • Page 46 1 Byte Object ID number Number of Objects 1 Byte List of Object ID 1 Byte List of Object length 1 Byte List of Object value 1 Byte Depending on the Object ID VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 47: Levelmaster Commands

    14 Supplement 14.5 Levelmaster commands The VEGAPULS C 21 is also suitable for connection to the following RTUs with Levelmaster proto- col. The Levelmaster protocol is often called "Siemens" "Tank protocol". Protocol ABB Totalflow Levelmaster Kimray DACC 2000/3000 Levelmaster Thermo Electron Autopilot...
  • Page 48 = 81, even = 71 (default), odd = 71 Response: Set Baud Rate 11 characters ASCII Example: U01B9600E71 Change instrument on address 1 to baudrate 9600, parity even, 7 data bits, 1 stop bit VEGAPULS C 21 • Modbus and Levelmaster protocol...
  • Page 49 250), default = 127 ms Error codes Error Code Name EE-Error Error While Storing Data in EEPROM FR-Error Erorr in Frame (too short, too long, wrong data) LV-Error Value out of limits VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 50: Configuration Of Typical Modbus Hosts

    14 Supplement 14.6 Configuration of typical Modbus hosts Fisher ROC 809 (Rx/Tx -) (Rx/Tx +) +30 Vdc Fig. 29: Connection of VEGAPULS C 21 to RTU Fisher ROC 809 VEGAPULS C 21 RTU Fisher ROC 809 Voltage supply ABB Total Flow Bus + Bus - VBAT Fig.
  • Page 51 14 Supplement Thermo Electron Autopilot Rx - +30 Vdc Fig. 31: Connection of VEGAPULS C 21 to RTU Thermo Electron Autopilot VEGAPULS C 21 RTU Thermo Electron Autopilot Voltage supply Bristol ControlWave Micro RS 485 on COM1 1 +SV 2 RX-...
  • Page 52 14 Supplement ScadaPack COM Part 3 (C3) RS485 TXD- TXD+ +30 Vdc Fig. 33: Connection of VEGAPULS C 21 to RTU ScadaPack VEGAPULS C 21 RTU ScadaPack Voltage supply Parameter Parameter Value Fisher Value ABB Total Value Fisher Value Fisher...

  • Page 53: Dimensions

    VEGAPULS C 21 ø 76 mm (2.99") G1; 1NPT R 1½ 1½ - 14 NPT G1½ ø 68 mm (2.68") Fig. 34: Dimensions VEGAPULS C 21 Thread G1½ Thread 1½ NPT Thread R1½ VEGAPULS C 21 • Modbus and Levelmaster protocol...

  • Page 54: Industrial Property Rights

    Les lignes de produits VEGA sont globalement protégées par des droits de propriété intellec- tuelle. Pour plus d'informations, on pourra se référer au site www.vega.com. VEGA lineas de productos están protegidas por los derechos en el campo de la propiedad indus- trial. Para mayor información revise la pagina web www.vega.com.
  • Page 55 Notes VEGAPULS C 21 • Modbus and Levelmaster protocol...
  • Page 56 Subject to change without prior notice © VEGA Grieshaber KG, Schiltach/Germany 2019 VEGA Grieshaber KG Phone +49 7836 50-0 Am Hohenstein 113...

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