Sigma
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- sigmaPAC CU-02 -
User manual
8
3-1-2
USB Serial Communications Connection
Installing
the cable
In order to connect a Personal Computer using the USB (optional) connection, install
an USB standard cable having an USB type “B” connector (CPU side) and an USB
type “A” connector (PC side). This type of cable is standard for the USB connections
and the installation is easy as each connector has only one insertion versus.
Installing the
USB driver
1.
In Internet at the address:
http://www.ftdichip.com/Drivers/VCP.htm
locate the FT232B device and download the latest driver for the
Operating System installed on the PC.
2.
Connect the USB cable between the CPU and the PC.
3.
Install the 2 drivers as explained in the installation manual, first the
one of the USB device, then the driver that links the USB port to a
COM port in the Personal Computer.
Setting the
communications
parameters
Once connected the CPU to the PC with the USB cable, the user must configure
the HyperTerminal in order to communicate with the USB port. The number of the
COM port linked to the USB connector can be found in:
Start\ControlPanel\System\Hardware\Peripherals\Ports (COM and LPT)
(locate the “
USB to COM #
” entry). Using the COM port number open a new
session of HyperTerminal and set the default communication parameters for the
service port:
3-1-3
Setting the Communications Parameters of the CPU RS232 Service Port
The default configuration for the Service RS232 port is:
During the configuration session it will be possible to change the baudrate, stop bit
and parity. When the communications parameters of the CPU are changed, the
communications parameters of the terminal (or PC) must be changed accordingly.
The setup is performed by browsing the menus sent to the VT100 terminal or to
the terminal emulation program (HyperTerminal) by the CPU.
PC side
USB Type A Connector
CPU side
USB Type B Connector
Baud rate
9600
Data
8bit
Stop bit
1
Parity
None
Flow Control
None
Baud rate
9600
Data
8bit
Stop bit
1
Parity
None
Flow Control
None
