Chapter 16 FBs-7SG 7/16-segment LED Display
Contents
1. Set appropriate driving voltage for each group according to the number of LEDs in each group of the 7 segment display and adjust LED to the best display condition according to the forward voltage drop of each group and ensure no over voltage OV has occurred Enter OR to the FBs PLC to light up the 7 segment LED display or display characters and numbers by means of FUN84 TDSP End 16 3 FBs 7SG I O address O See FBs 7SG Hardware Wiring Section 16 4 1 for details Refer to Section 16 4 for details about the circuit of 7 segment LED display See FBs 7SG Hardware Setup Section 16 4 2 for details O See FUN84 TDSP Commands Section 16 8 for details Every FBs 7SG module will occupy three to eight output registers OR addresses R3904 R3967 in the I O address In general WinProladder will detect and calculate the actual I O addresses occupied by the expansion modules installed on the system after connecting to the PLC Users may refer to the I O Module Number Configuration provided by WinProladder in order to find out the exact I O address of each expansion module to facilitate programming 16 4 FBs 7SG hardware wiring and setup 16 4 1 FBs 7SG hardware wiring The hardware wiring diagram of FBs 7SG is shown above In addition to the external 24V power expansion module input and expansion module output users will only need to connect the output to a 7 16 segment2. multiplexing at the same time to select a group of LEDs 8 segments a DO p D7 are source output signals PNP controlling the display of corresponding segments 16 8 16 6 Decode display and non decode display D Non decode display All segments are dimmed controlled by user defined applications independently A total of 8 ORs are equipped on FBs 7SG2 to control the display of 128 segments Each segment is controlled by a corresponding bit When the bit value is 1 the corresponding segment will light up The correlations of each segment and OR is tabulated below OR is the first output register that occupied by the module Each OR will output signals twice i e 1 bit of data 8 segments each time These data will be transferred to the corresponding outputs p D7 a DO OR D15 D8 D7 DO OR 0 SEG15 SEG8 SEG7 SEGO CHO OR 1 SEG31 SEG24 SEG23 SEG16 OR 2 SEG47 SEG40 SEG39 SEG32 OR 3 SEG63 SEG56 SEG63 SEG48 OR 4 SEG15 SEG8 SEG7 SEGO GEK OR 5 SEG31 SEG24 SEG23 SEG16 OR 6 SEG47 SEG40 SEG39 SEG32 OR 7 SEG63 SEG56 SEG63 SEG48 7 segment LED correspondence D6 lt a gt ry A D1 f lb DS Do y 3 ie X D2 jej lc D4 lt a REO D7 D3 O 16 segment LED correspondence NE es AAA The digit on the farthest right of the display board 8 digits max corresponds to outputs SEGO SEG7 the next digit to the left corresponds to outputs SEG8 SEG15 th
3. 1 mot e gt ke A PSI N e 2 e Y e e gt D LO o e gt ieee eee SS gt SA oO an e 55 er lt 2 235 io aes e aov PDD NDE o ES o _ MI zas e gt a SO 8 gt o LO gt a gt 2 Daa eS op 2 Sr LO a gt o o gt c S Lis a e HA gt gt 5 2 N j E Lo pio ma o 2 l a ae D p lt 9 0 AAA N Pat Ih ZS gt S Dm amp a Ds Ro I Eog gt 283 AS Z A SEES 62 old ole oO paa ee E E SEISXBILBEE 5 9 8 tr 2 aa anaaga E 5 8 S S SS SS z EPERE E4552 E The above diagram indicates the correct wiring common ground of the 7 segment LED display or independent LED display of FBs 7SG Users may make their own display according to this circuit and layout and connect the display to any output socket on FBs 7SG with a 16 pin flat ribbon cable We offer LED display boards and products in six different dimensions to meet the demands of users The table below shows the range of our LED display boards and products 16 7 Model Specification DBAN 8 DBAN 8LEDR 0 8 x4 16 segment LED display board with red LEDs onboard DBAN2 3 DBAN2 3LEDR 2 3 x4 16 segment LED display board with red LEDs onboard DB 56 DB 56LEDR DB 8 DB 8LEDR 0 56 x8 7 segment LED display board with red LEDs onbo
4. 16 changes correspond to the following displays 4 bit digital 7 segment LED decode and non decode number displays Segment DIM 0 Nibble Value 7 segment LED ON 1 Number A display structure Hexadecimal Binary a j b ic dje fig 0 0000 al o O 1 0001 o1 1folo o o i 2 0010 11110114110 1 e 3 0011 1 1 4 4 o o 4 4 4 0100 ol111 o10 1 1 y 5 0101 h lilolililolila G 6 0110 i lato lr ala jala E 7 0111 A 11111101011710 8 1000 i 14l14l1l1l111 1 H 9 1001 1l14l1l1lol1 1 E lt i A 1010 olololololol1 B 1011 1lo olalala 1 E C 1100 MERA H D 1101 ololo 111 0 1 E E 1110 ololo 111 11 E F 1111 ololololololo 16 10 Sak ASCII Code and 16 segment number display cross reference table z gt y x E Joa an A N Y YA x PAU EUS y UA 2 hoz z CCO x Zz Nx f 7 gt PA NAS A x Y 4 J he wah wed KA E A ANNA A NY Y WN VANA 2 AADA E MES x x Z La ZAS N a Mf Y NAAQS ZAIN S RY o ie Ve o V N E e YY 3 o x P N o DO OO Oo 2 A 8 Xx O o o gt a o o y o qs o o o q o o s o o er o o se o o w o o AI pt mm o o o o pa ba ST o o o o E o o o
5. Nd O O O O 0 63 e This convenient instruction is used to generate the corresponding display pattern for FBs series 7 segment or 16 segment display pannel under the control of FBs 7SG1 or FBs 7SG2 modules When execution control EN 1 input OFF 0 and input ON 0 this instruction will perform the display pattern conversion where S is the starting address storing the being converted characters Ns is the pointer to locate the starting character NI tells the length of being converted characters and D is the starting address to store the converted result Nd is the pointer to locate the start of storing There are 4 kinds of operation mode as below Md 0 display pattern conversion for 16 segment display the source character is the 8 bit ASCII Code the converted result is the 16 bit display pattern By the control of M1990 it determines the display direction where M1990 0 right to left display M1990 1 left to right display Md 1 Without leading zero display conversion for 16 segment display the source character is the 8 bit ASCII Code the converted result is the 16 bit display pattern without leading zero Md 2 Non decoded display pattern conversion for 7 segment display the source character is the 4 bit nibble code the converted result is the 8 bit display pattern Md 3 Without leading zero display conversion for 7 segment decoded display the source character is the 4 bit nibble code the conve
6. 0 1V2 T JP9 6V JP3 JP8 gt Jumper Layout back of module The jumper settings below are referred to FBs 7SG2 because they have covered those in FBs 7SG1 Attribute Jumper Function JP2 Decode D closed Non decode D open setting JP3 O V Test T or Normal No Jumper Common setting JP High Voltage HV selection back of module JP5 High HV Low LV voltage selection CHO JP6 0 6V 0 6V voltage drop fine tuning JP7 1 2V 1V2 voltage drop fine tuning JP8 High HV Low LV voltage selection CH1 JP9 0 6V 0 6V voltage drop fine tuning JP10 1 2V 1V2 voltage drop fine tuning 16 4 FBs 7SG1 FBs 7SG2 JP5 JP8 JP1 JP7 JP10 JP6 JP9 LED Driving Voltage Open Open 2 4V Open Short 3V LV Inactive Short Open 3 6V Short Short 4 2V Open Open 4 9V Open Short 5 5V 7 5V Short Open 6 1V Short Short 6 7V Open Open 7 4V Open Short 8V HV 10V Short Open 8 6V Short Short 9 2V Open Open 9 9V Open Short 10 5V 12 5V Short Open 11 1V Short Short 11 7V Short JP5 JP8 with a jumper horizontally place the jumper head onto the JP5 JP8 JP1 is located at the back of the module Turn module over for setup 12 5V 1 1m 1 11 10V JP1 7 5V 11 I suondo aaJu y JO uo ISO0YY BOOST 11 l1 IiE fe we Short only one of the three options above JP1 is effective o
7. 911 will store the converted pattern for text message displaying D operand begins from R3904 Nd operand is pointed to word 0 NI operand is 8 for quantity While M1990 1 the 16 segment pannel will display WELCOME While M1990 0 the 16 segment pannel will display EMOCLEW When M101 1 M102 0 the registers R3904 R3911 will be filled with the all OFF pattern for displaying When M102 1 the registers R3904 R3911 will be filled with the all ON pattern for displaying Example2 8 character of display without the leading zeor through the second FBs 7SG2 display module and 16 Segment display pannels for this application the FBs 7SG2 module must be set to work at the non decoded operation mode 84 TDSP M110 EN MD 1 S RO OFF Ns 0 Ni 8 on DP R3904 Nd 8 16 16 TDSP FUN84 FBs 7SG Display Module Convenient Commands FUN84 TDSP 7 16 segment display character and number display conversion TDSP When M110 1 the FUN84 will perform the display pattern conversion where the source S begins from the RO the start pointer Ns is pointed to byte 0 and the quantity NI is 8 it means the contens of RO R3 are the displaying characters the registers R3912 R3919 will store the converted pattern for message displaying D operand begins from R3904 Nd operand is pointed to word 8 NI operand is 8 for quantity 1 RO 0008H R1 0506H R2 0304H R3 0102H Display on the 16 segment displa
8. Chapter 16 FBs 7SG 7 16 segment LED Display Module 16 1 FBs 7SG overview There two models in the FBs 7SG range 7SG1 and 7SG2 Each of which has one or two 8 digit display driver ICs for driving eight or sixteen 7 segment LED displays using a common ground or four or eight 16 segment LED displays The drawing below is an example of FBs 7SG2 External 24V power input Expansion input connect to main unit or upper level expansion unit a o oo o il BB E o i E E 98888888 0008 Expansion output connect to lower level expansion unit gt 88888888 ELLEN First Channel 2nd Channel FBs 7SG has been equipped with an exclusive 7 segment LED display driver IC for multiplexing display of one to eight 7 segment or one to four 16 segment LED displays one group With one 16 core flat ribbon cable users can display 8 digits numbers or 64 independent LED displays 8 LEDs for one digit selectable between digital or LED display or 4 digit character display Every 7SG module will occupy three to eight output registers OR addresses R3904 R3967 in the I O address Therefore the PLC can control a maximum of 192 7 segnment displays or 64 16 segment displays or 1024 independent LED displays 16 1 16 2 The procedure of using FBs 7SG module Install FBs 7SG and connect the 24VDC power cable and 7 segnment LED display cable
9. H D R3907 Description When MO0 1 move the value to be output to the OR As described above OR 0 R3904 in the example controls the display of the first two digits OR 1 R3905 in the example the third and fourth digits OR 2 R3906 in the example the fifth and sixth digits and OR 3 R3907 in the example the last two digits The results are OR Contents R3904 EDBOH R3905 B3F9H ES 7 segment display contents E d 6 5 4 3 2 1 R3906 DFDBH R3907 CFBDH 16 9 FBs 7SG output commands FUN84 TDSP The TDSP commands are described in the next page 16 13 TDSP FUN84 FBs 7SG Display Module Convenient Commands FUN84 TDSP 7 16 segment display character and number display conversion TDSP Ladder symbol Md Operation Mode 0 3 84 TDSP S Starting address of being converted characters Md S Ns Ni D Ns Start of source character 0 63 NI Length of character 1 64 D Starting address to store the converted pattern Execution control EN All OFF Input control OFF Nd Start pointer while storing S operand can be combined with V Z PO P9 AIL ON Input control ON index registers for indirect addressing Na Range HR OR ROR DR K Index RO R3904 R5000 DO Positive Vs Zs Oper integer PO P9 and R3839 R3967 R8071 D3999 16 32 bit Md 0 3 S O O O O O Ns O O Q O 0 63 NI O O O O 1 64 D O O O O
10. Is 0 S a e A R3904 R3905 R3906 Nd point is 8 R391 1 R3912 R3913 R3914 R3915 R3916 R3917 R3918 R3919 is 8 Nibbles FUN84 Example1 8 character of text display by using the FBs 7SG2 display module and 16 Segment display pannels for this application the FBs 7SG2 module must be set to work at the non decoded operation mode The WinProladder supports the ASCII Table editing for easy and convenient text message display we can create one ASCII Table with the content WELCOME for testing and we assign R5000 is the table starting address then R5000 R5007 will have the follwoing contents 16 15 TDSP FUN84 FBs 7SG Display Module Convenient Commands FUN84 TDSP 7 16 segment display character and number display conversion TDSP R5000 2027H 20H 27H R5001 4557H 45H E 57H W R5002 434CH 43H C 4CH L R5003 4D4FH 4DH M 4FH 0 R5004 2045H 20H 45H E R5005 2C27H 2CH 27H R5006 4E45H 4EH N 45H E R5007 0044H OOH 44H D S500 M1990 4 gt 84 TDSP M100 e W EN MD 0 M104 S R5000 OFF Ns 2 NI 8 M102 l ON D R3904 Nd 0 Description When M100 1 M101 0 and M102 0 the FUN84 will perform the display pattern conversion where the source S begins from the R5000 the start pointer Ns is pointed to byte 2 and the quantity NI is 8 it means the contens of R5001 R5004 are the displaying characters the registers R3904 R3
11. LED display board with an 16 core FRC flat ribbon cable 16 2 16 4 2 FBs 7SG hardware setup The drawing below presents the output driver circuit of the internal display IC on FBs 7SG General users will not need to calculate the voltage drop of LEDs They will only need to adjust the voltage according to the jumper table below in order to prevent over voltage 40mA Pa Fixed current for Vic VIN VLED 0 8V Ps displaying IC Driving power source praying Pp 40mA x Vic lt 0 8W VIN y Za oe LED VLED 1 7 2 8V Numbers of cascade pray connected amp sect LED Y i K Multiplexing scan VMUX 0 8V Fixed 1 The power consumption will completely depend on the amount of voltage drop Vic Pp 40mA x Vic connected to it because the IC current source is fixed at 40mA As shown in the above diagram Vic Vin Viep 0 8V i e Vic is affected by the driving current voltage Vin and the forward voltage drop of the 7 segment display Viep because the safety power consumption of display IC at the severest ambient temperature condition must be controlled at or under 0 8W i e Vic must be smaller than 2V If the Vic is too low the brightness of the LED will be reduced if it is too high it will result in incorrect display LEDs that are not supposed to be lighted up will be lighted up or display IC damage The forward voltage drop of LED is generally between 1 7V and 2 8V Depending on the size of ordinar
12. ard 0 8 x8 7 segment LED display board with red LEDs onboard DB2 3 DB2 3LEDR 23 x8 7 segment LED display board with red LEDs onboard DB4 0 DB4 0LEDR 4 0 x4 7 segment LED display board with red LEDs onboard X Models inside parentheses are products equipped with LED display and ribbon cable socket Recommended pin settings Model dl JP1 JP7 JP10 JP6 JP9 Driving Voltage JP5 JP8 DBAN 8 LV Open Short 3V DBANZ2 3 HV 10V Open Open 7 4V DB 56 LV Open Open 2 4V DB 8 LV Short Open 3 6V DB2 3 HV 10V Short Short 9 2V DB4 0 HV 10V Short Open 8 6V Users can adjust the pin settings tabulated above table on any FATEK standard products If higher brightness is desired users can fine tune the driving voltage according to the jumper settings as shown above Users must avoid over voltage O V of output O V indicator will light up in order not to blow the 7SG module Connector pin layout Pin Signal Pin Signal 1 DIGO 2 DIG1 3 DIG2 4 DIG3 5 DIG4 6 DIG5 7 DIG6 8 DIG7 9 a DO 10 b D1 11 c D2 12 d D3 13 e D4 14 f D5 15 g D6 16 p D7 There are two display output connectors on 7SG2 each can support 64 segments of LED display When all segments are on 8 segments will be scanned at a time for a total of 8 times DIGO DIG7 as tabulated above refer to low active output signals Sink or NPN output only one signal will be active
13. ddress they occupied see Chapter 12 WinProladder User s Manual for details will be displayed on the screen when WinProladder is connected to the PLC If a FBs 7SG2 is connected to the FBs PLC users will find in the project window that the system has automatically assigned the output address to FBs 7SG2 when WinProladder is connected to the PLC Program example 1 Decode Display Mode Control of 8 digit 7 segment display with FBs 7SG1 with decimal point on In this case the FBs 7SG1 must be set to Decode Mode MO 08 MOV EN S OOFFH D R3904 08 MOV EN S 5678H D R3905 08 MOV EN S 1234H D R3906 16 12 Description When MO0 1 move the value to be output to the OR As described above OR 0 R3904 in the example controls the display of decimal point in decode mode OR 1 R3905 in the example controls the display of the lower section of the four digits and OR 2 R3906 in the example the upper section of the four digits The results are OR Contents R3904 OOFFH Cc 7 segment display contents 1 2 3 4 5 6 7 8 R3905 5678H R3906 1234H Program example 2 Non decode Display Mode Display numbers on the 8 digit 7 segment display with FBs 7SG1 with decimal point on In this case the FBs 7SG1 must be set to Non decode Mode 08 MOV MO EN S EDBOH D R3904 08 MOV EN S B3F9H D R3905 08 MOV EN S DFDBH D R3906 08 MOV EN S CFBD
14. e digit on the farthest left of the display board corresponds to outputs SEG63 SEG56 Each 7SG2 can drive sixteen 7 segment LED displays Segments DO D15 of the digit on the farthest right of the display board 4 digits max correspond to outputs SEGO SEG15 on 7SG2 the next digit to the left corresponds to outputs SEG16 SEG31 the digit on the farthest left of the display board corresponds to outputs SEG63 SEG48 Each 7SG2 can drive 8 16 segment LED displays 16 9 Decode Display Display data on the corresponding segments with default coding In this mode a total of 5 output registers OR are equipped on FBs 7SG2 to control the display of 16 digits of 7 segment LEDs Each digit is controlled by 4 bits The decimal point of an 8 digit number is controlled by the first output register Each point is controlled by the corresponding bit The correlations among the digits decimal point and ORs are tabulated below OR is the first output register that occupied by the module Attribute OR D15 D12 D11 D8 D7 D4 D3 DO Common OR 0 P15 P8 P7 PO OR 1 DIG3 DIG2 DIG1 DIGO CHO 1_st 8 digit OR 2 DIG7 DIG6 DIG5 DIG4 OR 3 DIG3 DIG2 DIG1 DIGO eri 2_nd 8 digit OR 4 DIG7 DIG6 DIG5 DIG4 ORO controls the display of decimal point When the value is 1 the corresponding decimal point will light up OR1 OR4 control the display of 16 digit numbers Each digit will be controlled by four corresponding bits A total of
15. nly when HV is selected from JP5 When LV is selected from JP5 JP1 will be ineffective When BOOST is short the driving voltage will be boosted by 5 to compensate circuit voltage drop JP5 to JP7 are effective on CHO and JP8 JP10 on CH1 16 5 16 4 3 LED driving voltage setup and over voltage OV inspection Users must select the correct driving voltage according to the voltage requirements of LEDs of different sizes before applying the module If the voltage is too low the brightness of LEDs will be reduced If the voltage is too high the brightness of LEDs will be uneven More importantly the LED driver IC will be blown due to over voltage O V Therefore it is necessary to make sure that the CE intermittent voltage VIC of the driver IC is below 2V to prevent an O V of the driver IC Yet it is difficult for users to measure the VIC of driver IC in multiplexing Therefore FBs 7SG is equipped with an O V LED indicator to facilitate users to check if an OV occurs The O V indicator is located next to the output socket on the panel labeled with O V The result of the O V indicator is meaningful only when all segments a total of 64 including the decimal point are lighted up If the O V indicator is out in this situation it means there is no O V If the indicator is on it means there is an O V the indicator may blink or is on constantly if not all segments are lighted up in this case it is meaningless If y
16. o o o o o e lt 16 11 16 7 FBs 7SG input power requirements and consumption FBs 7SG is equipped with a DC24V isolated power supply to convert an external 24V power input into power supply for use by the internal circuit and 7 segment LED display on FBs 7SG The tolerance of input is DC24V 20 FBs 7SG consumes 2Wmax when idled The consumption increases according to the number of 7 segments lighted up The segment driving current of every display IC on FBs 7SG is 40mA The driving current for displaying one digit using 8 segments consumes 320mA and the maximum power consumption of a group is obtained as formulated below Pd 320mA x VIN LED driving voltage 0 8 power efficiency W Total consumption 2 Pd xn W For example the total power consumption of FBs 7SG2 output from both groups at maximum power VIN 12 5V all 8 segments are on 2W 320mA x 12 5V 8 7W 16 8 Controlling display contents with OR on FBs 7SG There are two ways to light up an LED with FBs 7SG In this section we will introduce the method of how to light up a 7 segment number display by programming the OR output In the next section we will continue with displaying special symbols with FUN84 If displaying numbers with OR controls in decode mode digits in front of a number will be displayed as 0 If expansion modules are connected to the FBs PLC these modules and the I O a
17. ou want to perform a full segment test set the TEST Jumper JP3 to T only when the PLC is OFF on the lower left part of 7SG or use the convenient command FUN84 TDSP on 7SG by setting All Input ON to 1 PLC is in RUN mode to light up all segments for an O V test The following examples show the LED of FBs 7SG module driving voltage setup and O V test procedures 1 Set JP3 to T or All Input ON of FUN84 TDSP to 1 2 Start with LV and then adjust driving voltage to the required brightness or the O V indicator is on according to the jumper setting as shown in the table above When the O V indicator is on reduce voltage until the O V indicator is off Please be noted that if the brightness is at its maximum level but it cannot meet the requirements replace LEDs with higher efficiency 3 Set JP3 back to N normal position or All Input ON of FUN84 TDSP to 0 A Caution The 7 segment LED display of FBs 7SG is driven by the driver IC with a rated current 40mA The power consumption depends on the VIC of CE because the maximum power limit is only 0 7W 25 C do not use module in O V condition to prevent the driver IC from blowing 16 6 16 5 7 segment LED display and individual LED display circuits oe lt S A TA 5 yr D a N D oF a 8 Tf g DAY Oo l are gt o 10 1 aPo
18. rted result is the 4 bit display pattern without leading zero Byte 0 or Nibble 0 of S is the 1 displaying character Byte 1 or Nibble 1 of S is the a displaying character Ns operand is the pointer to tell where the displaying character starts NI operand is the character quantity for conversion 16 14 TDSP FUN84 FBs 7SG Display Module Convenient Commands FUN84 TDSP 7 16 segment display character and number display conversion TDSP D oerand is the starting address to store the converted display pattern while Md 0 or 1 one source character of 8 bit ASCII code needs one 16 bit location to store the result while Md 2 one source character of 4 bit nibble code needs one 8 bit location to store it while Md 3 one source character of 4 bit nibble code needs one 4 bit location to store it Nd operand is the pointer to tell where is the start to store the converted pattern e When inputs OFF 1 ON 0 and EN 0 1 the D operand will be filled with the all OFF pattern according to the operation mode the Nd pointer and the quantity of NI When inputs ON 1 OFF 0 1 and EN 0 1 the D operand will be filled with the all ON pattern according to the operation mode the Nd pointer and the quantity of NI e Data will be converted differently based on the selected mode The description below is based on Example 2 In Example 2 MD 1 S RO Ns 0 NI 8 D R3904 and Nd 8 Data conversion is presented below Ns point
19. the quantity NI is 4 it means nibble0 nibble3 of RO are the displaying characters the output registers R3906 R3907 will store the converted pattern for displaying D operand begins from R3906 Nd operand is pointed to byte 0 NI operand is 4 for quantity RO 1024H gt The 7 segment pannel will disply 1024 Example4 12 digit of decoded numeric display without the leading zero through the control of FBs 7SG2 display module and 12 digit of 7 segment display pannels For this application the FBs 7SG2 module must be set to work at the decoded operation mode 84 TDSP M130 o EN 4 MD 3 S i RO OFF Ns 0 NI 12 on D R3905 Nd 0 Description When M130 1 the FUN84 will perform the display pattern conversion where the source S begins from the RO the start pointer Ns is pointed to nibble 0 and the quantity NI is 12 it means nibble0 nibble11 of RO R2 are the displaying characters the output registers R3905 R3907 will store the converted pattern for displaying D operand begins from R3904 Nd operand is pointed to nibble 0 NI operand is 12 for quantity 1 R2 1234H R1 5678H RO 9000H Display on the 7 segment display 123456789000 2 R2 0000H R1 5678H RO 9000H Display on the 7 segment display 56789000 16 18
20. y 12345608 2 RO 0708H R1 0506H R2 0000H R3 0000H Display on the 16 segment display 5678 3 RO 3738H R1 3536H R2 3334H R3 3132H Display on the 16 segment display 12345678 4 RO 3038H R1 3536H R2 3334H R3 3030H Display on the 16 segment display 345608 X The I O address of FBs 7SG2 in Example 2 must be at R3912 R3919 to ensure the correct display of the message number length 8 i e other digital or analog output modules may be connected in front of FBs 7SG2 Example3 4 digit of numeric display and 32 point of external independent LED s display through the control of FBs 7SG1 display module and 4 digit of 7 segment display pannel also it needs the extra circuit to control the 32 point of independent LED s display For this application the FBs 7SG1 module must be set to work at the non decoded operation mode 16 17 TDSP FUN84 FBs 7SG Display Module Convenient Commands FUN84 TDSP 7 16 segment display character and number display conversion TDSP 08D MOV M120 EN S WMO D R3904 84 TDSP EN4 MD 2 S RO OFF Ns 0 NI 4 on P R3906 Nd 0 Description When M120 1 the status of MO M31 will be copied to the output registers R3904 R3905 to control the display of the 32 point of independent LEDs The FUN84 also performs the display pattern conversion where the source S begins from the RO the start pointer Ns is pointed to nibble 0 and
21. y 7 segment or 16 segment LED displays each segment e g a g consists of one to five LEDs connected in series While the range of forward voltage drop among segments will be from 1 7V to 14V it will be impossible to drive different LED displays with a single voltage In order to drive the majority 7 segment LED displays FBs 7SG comes with four driving voltage options at 5V low voltage 7 5V 10V and 12 5V high voltage for the last three options and a fine tuning function at 0 6V 1 8V by means of the diodes and jumpers incorporated to them In practice the power supply can drive LEDs of different forward voltages and prevent display IC from blowing by limiting Vic within 2V The diagrams below show the high low voltage setup common of LED on FBs 7SG the high low voltage driving options of displays and the jumper setting of forward voltage drop fine tuning and its exaction location as seen after opening the top cover of FBs 7SG In this section we will show you how to obtain the optimal display of 7 16 segment LED displays without blowing or shorten the life of the display IC by means of driving voltage Vin setup high low voltage selection and forward voltage fine tuning 16 3 FBs 7SG jumper location yoga ya Qe es Me oo00000 Jumper Layout open top cover gt JP5 JP6 6V JP7 1V2 JP1 JP1
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