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Summary of Contents for KRAL BEM 150
- Page 1 Operating instructions KRAL processing unit BEM 150 SW 1.06 OIE 27en-GB Edition 2020-01 Original instructions www.kral.at...
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Page 2: Table Of Contents
Table of contents 1 About this document ............. 3 9.1.1 Setting the Modbus address...... 16 9.1.2 Managing the density table...... 16 Target groups .............. 3 9.1.3 Entering the density table ........ 17 Associated documents .......... 3 9.1.4 Selecting the mode for volume measurement Symbols................. 3 ................. 17 1.3.1 Danger levels ............ 3 9.1.5... -
Page 3: About This Document
1 About this document 1.1 Target groups 1 About this document 1.1 Target groups The instructions are intended for the following persons: o Persons who work with the product o Operator-owners who are responsible for the use of the product Persons who work with the product must be qualified. -
Page 4: Symbols In This Document
2 Safety 2.1 Proper use 1.3.3 Symbols in this document Meaning Warning personal injury Safety instruction Request for action Multi-step instructions for actions Action result Cross-reference 2 Safety 2.1 Proper use Use the processing unit only within the operating limits specified in the chapter "Technical data". 2.2 Foreseeable misuse o Any use that extends beyond the proper use or any other use is misuse. -
Page 5: Dimensional Drawing
4 Technical data 4.2 Dimensional drawing 4.2 Dimensional drawing Fig. 2: Dimensional drawing processing unit Parameter Unit Value L x W x H [mm] 155 x 81 x 57 Tab. 3: Dimensions 4.3 Power supply Parameter Unit Value min. Value max. Power supply [VDC] Current consumption [mA]... -
Page 6: Pin Assignment
5.1 Functional principle 5.1.1 Usage The processing unit is intended for usage with a KRAL flowmeter. Flowmeters generate a specific number of pulses per flow volume unit – depending on the size and working point. This device-specific characteristic is called the K-factor (unit: pulses/litre) and is spe- cified on the calibration certificate. -
Page 7: Volume Measurement
5 Function description 5.1 Functional principle Fig. 4: Connecting several processing units Flowmeter Display device (HMI) Processing unit Power supply display device Flowmeter C1 Power supply processing unit Processing unit C2 Connection Modbus RS-485 Flowmeter C3 Connection pick up Processing unit C4 Connection temperature sensor Terminating resistor Up to 32 processing units can be connected (32 sensor evaluations electrically in parallel). -
Page 8: Modbus Communication
5 Function description 5.2 Modbus communication 5.2 Modbus communication 5.2.1 Supported Modbus functions Code Modbus function Register Application examples READ HOLDING REGISTERS 4xxxx - Reading out of measured values, counter statuses, average values - Reading out of the device configuration PRESET MULTIPLE REGISTERS 4xxxx - Device programming... -
Page 9: Automatically Updated Parameters
5 Function description 5.2 Modbus communication 5.2.5 Automatically updated parameters These parameters are automatically updated by the processing unit 16 times per second, meaning that the updating interval for the Modbus data amounts to 62.5 ms. Name Description Address Type Length Alarm_Read Error message 0x14 Hold_Timer... -
Page 10: K-Factor Table
5 Function description 5.2 Modbus communication Name Description Address Type Length Value range Density_Reference_2 Density of heavy fuel oil at 15 °C [kg/m 0x3E 0.1 ... 80000.0 (Density_Determination = 3, 4 or 5) Maintenance_Hours Number of operating hours until the 0x4A –... -
Page 11: Density Tables
5 Function description 5.2 Modbus communication 5.2.8 Density tables Name Description Address Type Length Value range Temperature 1.1 Temperature 1 [°C] 0x60 -40.0 ... +200.0 Temperature 1.2 Temperature 2 [°C] 0x61 -40.0 ... +200.0 Temperature 1.3 Temperature 3 [°C] 0x62 -40.0 ... -
Page 12: Error Messages
5 Function description 5.2 Modbus communication 5.2.9 Error messages Mask Error message Description 0x00000001 Alarm 1 – K-factor table: Frequencies not in ascending The frequency values in the K-factor table are not order all in ascending order. 0x00000002 Alarm 2 – Density table: Temperatures not in ascending The temperature values in one of the density order tables are not all in ascending order. -
Page 13: Parameter For Clearing Error Messages
6 Transportation, storage 6.1 Unpacking and checking the state of delivery 5.2.10 Parameter for clearing error messages This parameter can only be written by the user. Name Description Address Type Length Alarm_Clear Clearing of an error message from the 0xC4 parameter "Alarm_Read"... -
Page 14: Removing The Processing Unit
8 Connection 7.3 Removing the processing unit Requirement: ü 4 fastening elements Fasten the processing unit at a suitable position to a firm underground through the four holes 1 in the housing. While doing so observe the ambient conditions, Ä Technical data, Page 4. 7.3 Removing the processing unit Requirement: ü... - Page 15 8 Connection 8.2 Connecting the processing unit Description Signal GND 2 GND 1 Tab. 24: Pin assignment for temperature sensor (3-wire Pt100) Fig. 7: Connecting one processing unit Fig. 8: Connecting several processing units Flowmeter Display device (HMI) Processing unit Power supply display device Flowmeter Power supply processing unit Processing unit...
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Page 16: Operation
9 Operation 9.1 Carrying out the basic settings 9 Operation 9.1 Carrying out the basic settings 9.1.1 Setting the Modbus address Modbus addressing is effected by means of two address selector switches on the circuit board of the processing unit. X10 X1 Fig. 9: Modbus addressing Remove the cover of the processing unit. -
Page 17: Entering The Density Table
9 Operation 9.1 Carrying out the basic settings Having a density table selected In the case of operation with two different pumped liquids, for example diesel and heavy fuel oil, the se- lection of the associated density table can be carried out automatically. To this purpose the current temperature of the pumped liquid is compared with the value of the parameter "Temperature_Switch". -
Page 18: Specifying The Reference Temperature For Temperature Compensation
9 Operation 9.1 Carrying out the basic settings 9.1.5 Specifying the reference temperature for temperature compensation The parameter "X_Temperature" is used for correction calculation of the density. This correction is called temperature compensation. The current density of the pumped liquid is calculated by means of the measured temperature of the flowing pumped liquid and of the stored density table. -
Page 19: Specifying The Minimum Flow Rate
9 Operation 9.2 Reading the measured values and status information 9.1.9 Specifying the minimum flow rate The minimum flow rate in [l/h] is specified by using the parameter "Flow_Zero_Threshold". This ensures that the flow rate changes to zero after a defined period (1/f ), irrespective of its aver- aging. -
Page 20: Maintenance
10 Maintenance 10.1 Required maintenance Cleaning an error message Enter the error message in the parameter "Alarm_Clear". Example: Error message 3 is to be cleared. Enter 0x00000004 for Error message 3 in the parameter "Alarm_Clear". ð If the cause of the error message is not eliminated, the corresponding value is retained in the para- meter "Alarm_Read". -
Page 21: Troubleshooting
12 Troubleshooting 12.1 Status LEDs 12 Troubleshooting 12.1 Status LEDs Pick up 1 (red) Pick up 2 (red) Data transmission TX (green) Data reception RX (red) Error (yellow) Overheating of the processing unit (red) Function (green) Power supply (green) Fig. 10: Status LEDs 12.2 Fault table Fault Cause... -
Page 22: Error Tree: No Communication
12 Troubleshooting 12.3 Error tree: No communication 12.3 Error tree: No communication Remove the cover of the processing unit and check the status of the LEDs. Power supply: 1. Check the power supply (12-24 VDC). Does green LED 8 light up? Temperature exceeds 105 °C: Overheating: 1. -
Page 23: Error Tree: No Flow
12 Troubleshooting 12.4 Error tree: No flow 12.4 Error tree: No flow Remove the cover of the processing unit and check the status of the LEDs. 1. Check the cabling of the pick ups. - Counter mode: Does red LED 1 or 2 flash? 2. - Page 24 KRAL GmbH, 6890 Lustenau, Austria, Tel.: +43/5577/86644-0, E-Mail: kral@kral.at www.kral.at...
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