Velleman VMB1USB - Manual (Page 5)

Velbus manual VMB1USB– edition 1 – rev.1.0
5
USE
Connect the module to the VELBUS system and the computer (see connection diagram).
At the First connection of the module with a computer without the driver, the upper USB status LED will blink. The
computer operating system detects new hardware and will ask to localize and to install the driver (.inf file). This
file can be downloaded from
www.velbus.be
After the installation of the driver, both LEDs will alternately blink as an indication communication is possible.
In case of a different LED status, the interface will be in one of following situations:
• Both LEDs are turned off when the USB cable is not connected.
• Both LEDs turn on when the USB cable is connected but the interface module is not powered.
• Only the upper LED turns on when the interface is powered but not reset.
• Only the lower LED turns on when the interface is powered and reset but has no attributed address.
• The LEDs blink very rapidly at too high a power consumption.
Run a program on the computer allowing you to communicate with the VELBUS system.
This program or the information needed to develop this program can be downloaded from
www.velbus.be .
When powering the module a ‘Bus active’ and a ‘Reception ready’ message will be sent to the computer.
All messages appearing onto the VELBUS system will also be forwarded to the computer.
Valid commands generated by the computer are forwarded to the module via the USB port.
These commands are placed onto the VELBUS system by the USB interface module.
When sending too many commands simultaneously, the reception buffer will overflow. This will be reported to the
computer. The computer program must break off the communication and wait for the ‘reception ready’ message to
send new commands.
If the commands are incorrectly placed onto the VELBUS, a bus error will occur and be forwarded to the
computer. The USB interface module will auto-restart after 25 seconds and erase the reception buffer.
Velbus forwarding LED
Velbus reception LED
USB status LEDs
Velbus power LED
Termination
12V power
-
+
L
H
Velbus
Connection to the USB port of the computer