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HD37AB1347
- 44 -
V3.0
SERIAL
INTERFACE
AND
USB
The
HD37AB1347
is fitted with an electrically isolated RS-232C serial interface, and
an USB 2.0 interface. Optionally, you can receive on request:
•
Serial connection cable (code
HD2110RS
) with M12 connector on instrument’s
side and Sub D 9-pole female connector on computer’s side.
•
Serial connection cable (code
HD2110USB
) with M12 connector on
instrument’s side and USB 2.0 connector on computer’s side.
The USB connection requires the previous installation of the driver (to be found on the
instrument software package).
Install the driver before connecting the USB
cable to the PC
(please see the details on chapter
Connection to the USB 2.0 port
).
Standard parameters of the instrument RS232 serial transmission are:
•
Baud rate 38400 baud
•
Parity None
•
N. bit 8
•
Stop bit 1
•
Protocol Xon/Xoff
It is possible to change the RS232C serial port baud rate by setting the
"Selection of
the serial transmission speed (Baud Rate)
" parameter in the menu (please see the
menu on chapter
The Baud Rate
). The possible values are: 38400, 19200, 9600,
4800, 2400, 1200. The other transmission parameters are fixed.
The USB 2.0 connection does not require the setting of parameters.
The selection of the port is carried out directly by the instrument: if the USB
port is connected to a PC, the RS232 serial port is automatically disabled, and
vice versa.
The instrument is provided with a complete set of commands and data queries to be
sent via the PC.
All the commands transferred to the instrument must have the following structure:
XXCR
where
XX
is the command code and
CR
is the Carriage Return (ASCII 0D)
The XX command characters are exclusively upper-case characters. Once a correct
command is entered, the instrument responds with “&”; when any wrong combination
of characters is entered, the instrument responds with “?”.
The instrument response strings end with the sending of the CR command (Carriage
Return) and LF (Line Feed).
Before sending commands to the instrument via the serial port, locking the keyboard
to avoid functioning conflicts is recommended: use the P0 command. When complete,
restore the keyboard with the P1 command.
Содержание DeltaOHM HD37AB1347
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