Matrix-orbital VFD2041 Legacy Manual de usuario descargar pdf (Pagina 24)

5.1.7 Read module type

This command will return, over the RS-232 interface in TTL levels only, the model type value of the

module. This command returns a 1-byte hex value. Values for various modules at the time of this publication

are as follows;

Table 10: Module Values

VFD0821 - 0x01 VFD2021 - 0x03 VFD2041 - 0x05

VFD4021 - 0x06 VFD4041 - 0x07 LK202-25 - 0x08

LK204-25 - 0x09 LK404-55 - 0x0A VFD2021 - 0x0B

VFD2041 - 0x0C VFD4021 - 0x0D VK204-25PC - 0x0E

VK204-25 - 0x0F GLC12232 - 0x10 GLC24064 - 0x13

GLK24064-25 - 0x15 GLK12232-25 - 0x22 LK404-AT - 0x31

LK402-12 - 0x33 LK162-12 - 0x34 LK204-25PC - 0x35

6 Appendix: Command Summary

6.1 General

The operation of the display is controlled by a simple and consistent command set.

Commands control;

• Text display

• Graphics

• Display keypad interface

• Miscellaneous operating parameters

This chapter includes summary tables of all commands.

6.2 Issuing Commands

Commands are issued to the display by the controller. In a test setup, commands can be issued to

the display by means of a BASIC program, using the chr$( ) function. In the tables below, we’ve shown

commands in hex, ASCII and decimal form. All commands begin with the preﬁx character 0xFE (254

decimal). These commands are issued on the serial communications link (I

C or RS-232) at the currently

deﬁned baud rate.

For example (using BASIC in a test setup), the user could issue the command to clear the screen on the

display by including the line;

in the BASIC program.

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