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LAUREL LWIFI User Manual Download Page 26

 

- 26 - 

The QModMaster Bus Monitor window below presents the Modbus Command trans-
mitted to the LWIFI and its response. Note that the hexadecimal values of 

59 9A 43 

5D

 represent the value in IEEE 754 floating point format (little endian). See Wikipedia 

for a condensed description of IEEE 754. 

 

 
 

Summary of Contents for LWIFI

Page 1: ...LWIFI LWFIX Laureate High Speed Wireless Communications User Manual LAUREL Electronics Inc 3183 G Airway Ave Costa Mesa CA 92626 USA Tel 714 434 6131 Fax 714 434 3766 Website www laurels com...

Page 2: ...3 3 Board Installation 4 4 Meter Installation Range Considerations 5 5 Network Setup Utility 6 6 Entry into Instrument Setup IS Software 9 7 Data Caching Data Rates Read Rates 11 8 Modbus Implementat...

Page 3: ...or advantage of the two WiFi boards compared to legacy Laureate communication boards when used with data polling The legacy communica tions boards which include RS232 RS485 USB and Ethernet are limite...

Page 4: ...y that the top and bottom edges of all circuit boards are at the same horizontal level If boards are inserted one electrical pin off this may burn out the electronics 2 Slide the electronics assembly...

Page 5: ...consider using LWFIX as opposed to LWIFI since it has about 10 dB higher output WiFi range depend on many factors which include the radiated power and sensiti vities not only of the WiFi board but al...

Page 6: ..._00 exe 500 kB from Laurel s software downloads web page or click here Copy the downloaded file into a directory of your choice and double click on the file name This will unzip the com pressed file i...

Page 7: ...is ready to communicate with the outside world at 38400 baud using the discovered COM port The WiFi Signal Quality and IP address are still shown as No Connection because there is yet no WiFi connecti...

Page 8: ...ay value peak value net value gross value display value Counter timer model numbers starting with L5 L8 alarm status display item 1 value peak value valley value item 2 value item 3 value Alarm and ov...

Page 9: ...s the Device Type then click on RS232 USB for Communications Type since you IS software communications will be via USB In the resulting Establish Communications screen select the COM port discovered b...

Page 10: ...10...

Page 11: ...d by the measurement intervals of the meter Unchanged values are read by the external Modbus Master when data is read from cache at a rate faster than that at which readings are updated into cache Mea...

Page 12: ...read or written If a 32 bit value is to be held in Holding Registers two 16 bit register addresses must be specified A Coil is a 1 bit memory location that is used to control a specific outcome It ma...

Page 13: ...s Data Format FC04 0105 Read decimal point position 0001 xxxxxx 0002 xxxxx x 0003 xxxx xx 0004 xxx xxx 0005 xx xxxx 0006 x xxxxx FC03 7400 7401 Low address is most significant word High address is lea...

Page 14: ...x 0004 xxx xxx 0005 xx xxxx 0006 x xxxxx FC03 7000 Alarm and overload status in bits 1 5 5 4 3 2 1 Bit 1 Alarm 1 Bit 2 Alarm 2 Bit 3 Alarm 3 Bit 4 Alarm 4 Bit 5 Overload FC03 7002 7003 Display measure...

Page 15: ...Display value for analog DPMs Gross weight for scale meters Item 2 for counter timers FC03 7810 7811 Display value for analog DPMs Display value for scale meters Item 3 for counter timers 4 Reading a...

Page 16: ...il Cold reset Latched alarms reset Peak value reset Remote display reset External Input B true External Input B false External Input A true External Input A false Valley reset Tare function Tare reset...

Page 17: ...auses a meter reset Byte 3 Byte 2 Byte 1 Magnitude Mag XXXX XXXX XXXX XXXX XXXX XXXX S Sign Sign 1 for negative DP 1 for DDDDDD DP 6 for D DDDDD Sign Magnitude S M X XXX XXXX XXXX XXXX XXXX XXXX S Mag...

Page 18: ...etpoint1 Byte 2 Serial Confg3 Deviation4 Byte 2 Deviation3 Byte 3 Deviation3 Byte 1 Setpoint4 Byte 2 Setpoint Byte 3 Setpoint3 Byte 1 Alarm Confg 3 M Type read only Analog Type Modbus Address Byte Dev...

Page 19: ...fig2 Options Setup Alarm Config 2 Analog High Byte 3 Mag Mag Mag 2 s C 2 s C 2 s C Bits Byte Byte Byte Byte 2 s C 2 s C 2 s C Bits Mag Mag Mag Mag Mag Mag Mag Byte Bits Bits Mag Bits Bits Mag Mag Bits...

Page 20: ...In1 Byte 2 2 s C 2 s C Mag Mag Mag 2 s C 2 s C S M 2 s C 2 s C S M 2 s C 2 s C 2 s C 2 s C 2 s C S DP M 2 s C 2 s C S DP M 2 s C 2 s C S DP M 2 s C 2 s C S DP M Analog Low Byte 3 Analog Low Byte 1 Dev...

Page 21: ...1 Analog Low 2 High Reading 3 High Reading 1 High Input 2 Low Reading 3 Low Reading 1 Low Input 2 Offset 3 Offset 1 Scale Factor 2 Setpoint2 3 Setpoint2 1 Setpoint 1 2 Serial Cnfg 4 Spare Tare2 Spare...

Page 22: ...int values 2 QModMaster Download and Launch Download QModMaster Win64 exe 0 5 3 beta zip from https sourceforge net projects qmodmaster files latest download and copy it into a directory of your choic...

Page 23: ...23 b The second step is to click on Options Settings In the Settings dialog window ensure that everything is configured as shown and click on OK These are the default settings...

Page 24: ...Modbus Mode TCP Function Code Read Holding Registers 0x03 Start Address 8200 dec Number of Registers 2 Data Format Float After QModMaster has been set up to read the floating point value Click on the...

Page 25: ...rument s displayed value of 221 35 is read and presented in the main QMod Master window The values in holding registers 8200 and 8201 are combined to form a 32 bit value and are displayed in floating...

Page 26: ...w presents the Modbus Command trans mitted to the LWIFI and its response Note that the hexadecimal values of 59 9A 43 5D represent the value in IEEE 754 floating point format little endian See Wikiped...

Page 27: ...value The critical items are Modbus Mode TCP Function Code Read Holding Registers 0x03 Start Address 7400 Dec Number of Registers 2 Data Format Hex The Read Write icon has been clicked and the values...

Page 28: ...28...

Page 29: ...which is setup to read the alarm and overload status The critical items are Modbus Mode TCP Function Code Read Holding Registers 0x03 Start Address 7000 Dec Number of Registers 1 Data Format Binary Th...

Page 30: ...30 The diagram below describes how each of the bits is interpreted...

Page 31: ...31 You may wish to use the Windows calculator to convert two s complement values to decimal and vice versa...

Page 32: ...izontal surface of metal cabinet USB interface USB 2 0 via mini USB connector WiFi Performance Wireless LAN standard IEEE 802 11 b g n Transmit receive frequency 2 4 GHz license free ISM band Maximum...

Page 33: ...000 msec set for 60 or 50 Hz noise rejection Totalized pulse readings Signal period or gate time from 10 to 199 99 ms Frequency rate pulse readings Gate time 30 msec 1 2 signal periods Communication...

Page 34: ...s 5 Mishandling or abuse The warranty set forth above is exclusive and no other warranty whether written or oral is expressed or implied Laurel specifically disclaims implied warranties of merchantabi...

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