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LX3V-4AD

 

7                                                       

                                                                       

WECON TECHNOLOGY CO., LTD.

 

b3: Hardware error

 

A/D 

converter 

or 

other 

hardware failure

 

Hardware normal

 

b10: Digital range error

 

Digital output value is less than 

-2048 or more than +2047

 

Averaging  is  normal.  (between 

1 and 4096)

 

b11: Averaging error

 

Number of averaging samples is 

4097  or  more  or  0  or  less 

(default of 8 will be used)

 

Averaging  is  normal.  (between 

1 and 4096)

 

b12: Adjust prohibit

 

Prohibit-(b1,  b0)  of  BFM  #21  is 

set to (1, 0)

 

Permit-(b1,  b0)  of  BFM  #21  is 

set to (0,1)

 

 

NOTE:   

 

b4 to b7, b9 and b13 to b15 are undefined. 

 

5)

 

Identification Code BFM #30 

The  identification  (or  ID)  code  number  for  a  Special  Function  Block  is  read  using  the  FROM 

command. 

This number for the LX3V-4AD unit is K2011 or K2010. 

The user’s program in the PC can use this facility in the program to identify the special function 

block before commencing data transfer from and to the special function block. 

 

NOTE: 

 

Values of BFM #0, #23 and #24 are copied to EEPROM memory of the LX3V-4AD. BFM #21 and 

BFM  #22  are  only  copied  when  data  is  written  to  the  gain/offset  command  buffer  BFM  #22. 

Also, BFM #20 causes writing to the EEPROM memory. The EEPROM has a life of about 10,000 

cycles (changes), so do not use programs which frequently change these BFMs. 

 

 

Because  of  the  time  needed  to  write  to  the  EEPROM  memory,  a  delay  of  300  ms  is  required 

between  instructions  that  cause  a  write  to  the  EEPROM.  Therefore,  a  delay  timer  should  be 

used before writing to the EEPROM a second time. 

 

5.

 

Defining gain and offset 

 

Gain determines the angle or slope of the calibration line, identified at a digital value of 1000. 

(a) Small gain: Large steps in digital readings 

(b) Zero gain: Default is 5V or 20mA. 
(c) Large gain: Small steps in digital readings. 

Содержание LX3V-4AD

Страница 1: ...LX3V 4AD User manual Website http www we con com cn en Technical Support support we con com cn Skype fcwkkj Phone 86 591 87868869 QQ Group 465230233 Technical forum http wecon freeforums net ...

Страница 2: ... and or 4 to 20mA 20 to 20mA resolution 20µA may be selected Data transfer between the LX3V 4AD and the LX3V main unit is by buffer memory exchange There are 32 buffer memories each of 16 bits in the LX3V 4AD LX3V 4AD consumes 5V voltage from LX3V main unit or active extension unit 90mA current of power supply 2 Dimensions Extension cable and connector COM LED Light when communicating Power LED Li...

Страница 3: ...be wired separately from power lines or any other lines which may induce electrical noise 2 If a voltage ripple occurs during input or there is electrically induced noise on the external wiring connect a smoothing capacitor of 0 1 to 0 47µF 25V 3 If you are using current input connect the V and I terminals to each other 4 If there is excessive electrical noise connect the FG frame ground terminal ...

Страница 4: ...ice of input terminal Up to four input points can be used at one time Analog input range DC 10V to 10V input resistance 200kΩ Warning this unit may be damaged by input voltage in excess of 15V DC 20mA to 20mA input resistance 250Ω Warning this unit may be damaged by input currents in excess of 32mA Digital output 12 bit conversion stored in 16 bit 2 s complement form Maximum value 2047 Minimum val...

Страница 5: ...High speed operation can be selected with a value of 1 2 Channel 2 3 Channel 3 4 Channel 4 5 Channel 1 These buffer memories contain the averaged input values for the number of samples entered for the channel in buffer memories 1 to 4 respectively 6 Channel 2 7 Channel 3 8 Channel 4 9 Channel 1 These buffer memories contain the present value currently being read by each input channel 10 Channel 2 ...

Страница 6: ...et intercept The analog input value when the digital output becomes 0 Gain slope The analog input value when the digital output becomes 1000 Note 1 Channel Selection Channel initialization is made by a 4 character HEX number HOOOO in buffer memory BFM 0 The least significant character controls channel 1 and the 4 character controls channel4 BFM 0 Analog input Digital output Resolution Offset Gain ...

Страница 7: ...n and offset adjustments are prohibited to prevent inadvertent changes by the operator In order to adjust the gain and offset values bits b1 b0 must be set to 0 1 The default is 0 1 c Gain and offset values of BFM 23 and 24 are sent to non volatile memory gain and offset registers of the specified input channels Input channels to be adjusted are specified by the appropriate G O gain offset bits of...

Страница 8: ...facility in the program to identify the special function block before commencing data transfer from and to the special function block NOTE Values of BFM 0 23 and 24 are copied to EEPROM memory of the LX3V 4AD BFM 21 and BFM 22 are only copied when data is written to the gain offset command buffer BFM 22 Also BFM 20 causes writing to the EEPROM memory The EEPROM has a life of about 10 000 cycles ch...

Страница 9: ... unit please refer to program example 2 Bit device s b1 b2 of the gain offset BFM 21 should be set to 0 1 to allow adjustment Once adjustment is complete these bit devices should be set to 1 0 to prohibit any further changes Channel initialization BFM 0 should be set to the nearest range i e voltage current etc 6 Example program 6 1 basic program In the following example channels CH1 and CH2 are u...

Страница 10: ...D then the averaged data BFM s are read 5 In the case of this example BFM 5 and 6 are read into the LX3V main unit and stored at D0 and D1 These devices contain the averaged data for CH1 and CH2 respectively 6 2 Using gain and offset in a program The gain and offset of the LX3V 4AD can be adjusted using push button switches on the input terminal of the PC It can also be adjusted using software set...

Страница 11: ...analog special function block Adjustment start H0000 BFM 0 initialize input channels Enter the instructions on the left and RUN the PC K1 BFM 21 BFM 21 must be set to permit with b1 b0 0 1 K0 BFM 22 offset gain adjusts Reset adjust bits K0 BFM 23 offset K2500 BFM 24 gain H0003 BFM 22 offset gain adjusts 3 0011 i e O1 1 G1 1 Therefore channel 1 is adjusted Adjustment ends K2 BFM 21 BFM 21 gain offs...

Страница 12: ...Put the LX3V main unit into RUN 7 2 Error checking If the LX3V 4AD special function block does not seem to operate normally check the following items Check the status of the POWER LED Lit The extension cable is properly connected Otherwise Check the connection of the extension cable Check the external wiring Check the status of the 24V LED top right corner of the LX3V 4AD Lit LX3V 4AD is OK 24V DC...

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