Matrix-orbital VFD2041 User Manual Page 21
- Page / 53
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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Table 2: Default Values
Contrast 128
Backlight 255
Baud Rate 19.2 kbps
I
2
C Slave Address 0x50
Data Lock False
RS232AutoTransmitData True
NOTE The display module will revert back to the old settings once turned off, unless the
settings are saved.
3 Troubleshooting
3.1 The display does not turn on when power is applied.
• First, you will want to make sure that you are using the correct power connector. Standard floppy drive
power cables from your PC power supply may fit on the Power/Data Connector however they do not
have the correct pin out as can be seen in figure 11 on page 7. Matrix Orbital supplies power cable
adapters for connecting to a PC, which can be found in the Accessories Section on page 2.
• The next step is to check the power cable which you are using for continuity. If you don’t have an
ohm meter, try using a different power cable, if this does not help try using a different power supply.
• The last step will be to check the Power / Data Connector on the VFD2041. If the Power / Data
Connector has become loose, or you are unable to resolve the issue, please contact Matrix Orbital,
see 12.5 on page 49 for contact information.
3.2 The display module is not communicating.
• First, check the communication cable for continuity. If you don’t have an ohm meter, try using a
different communication cable. If you are using a PC try using a different Com Port.
• Second, please ensure that the display module is set to communicate on the protocol that you are
using, by checking the Protocol Select Jumpers. To change the protocol used by the display module
see Section 2.3 on page 13.
• Third, ensure that the host system and display module are both communicating on the same baud rate.
The default baud rate for the display module is 19200 bps.
• If you are communicating to the display via I
2
C please ensure that the data is being sent to the correct
address. The default slave address for the display module is 0x50.
NOTE I
2
C communication will always require pull up resistors.
• Finally, you may reset the display to it’s default settings using the Manual Override Jumper, see
Section 2.5 on page 15.
Matrix Orbital VFD2041 17
- Technical Manual 1
- Revision: 2.1 1
- Contents 2
- 1 Getting Started 5
- 1.2 Accessories 6
- Figure 4: Breadboard Cable 7
- Figure 5: Serial Cable 4FT 7
- Matrix Orbital VFD2041 3 7
- Matrix Orbital VFD2041 4 8
- Matrix Orbital VFD2041 5 9
- 1.3 Features 10
- 1.4 Connecting to a PC 11
- 1.5 Installing the Software 12
- 2 Hardware Information 13
- Matrix Orbital VFD2041 11 15
- 2.2 Power/Data Connector 16
- 2.3 Protocol Select Jumpers 17
- Matrix Orbital VFD2041 14 18
- 2.4 General Purpose Outputs 19
- 2.5 Manual Override 19
- Matrix Orbital VFD2041 16 20
- 3 Troubleshooting 21
- 4 Communications 22
- C Transaction Example 23
- 4.1.3 Serial Communication 23
- 4.2 Changing the I 24
- C Slave Address 24
- 4.3 Changing the Baud Rate 24
- CrystalSpeed 25
- 8×DesiredBaud 25
- 5.2 Auto Scroll On 27
- 5.3 Auto Scroll Off 28
- 5.4 Clear Screen 28
- 5.6 Set Auto Line Wrap On 29
- 5.7 Set Auto Line Wrap Off 29
- 5.8 Set Cursor Position 29
- 5.9 Go Home 30
- 5.10 Move Cursor Back 30
- 5.11 Move Cursor Forward 30
- 6 Special Characters 31
- 6.3 Saving Custom Characters 32
- 6.4 Loading Custom Characters 33
- 6.6 Initialize Medium Number 34
- 6.7 Place Medium Numbers 34
- 6.8 Initialize Large Numbers 35
- 6.9 Place Large Number 35
- 7 General Purpose Output 37
- 7.3 General Purpose Output On 38
- 7.4 Set Startup GPO state 38
- 8 Display Functions 39
- 8.4 Set VFD Brightness 40
- 9 Data Security 41
- 9.3 Data Lock 42
- 10 Miscellaneous 43
- 10.2 Read Version Number 44
- 10.3 Read Module Type 44
- 11 Command Summary 46
- 11.3 Special Characters 47
- 11.4 General Purpose Output 48
- 11.5 Display Functions 48
- 11.6 Data Security 48
- 11.7 Miscellaneous 49
- 11.8 Command By Number 49
- 12 Appendix 51
- 12.3 Physical Layout 52
- 12.4 Definitions 53
- 12.6 Revision History 53
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