- -
18
S
ERIAL
I
NTERFACE AND
USB
The HD25.2 is fitted with an electrically isolated RS-232C serial interface, and an USB 2.0
interface. The instrument can be connected using a serial cable with sub D 9-pole female connectors
(code
9CPRS232
) and a cable with USB2.0 connectors (code
CP22
).
The USB connection requires the previous installation of a driver contained in the DeltaLog11 CD-
Rom.
Install the driver before connecting the USB cable to the PC
(please see the details on
page 20).
Standard parameters of the instrument 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 "
Baud Rate
" parameter in the
menu (please see page 8). The possible values are: 38400, 19200, 9600, 4800, 2400 e 1200. The
other transmission parameters are fixed.
The USB 2.0 connection does not require the setting of parameters.
The selection of the port (serial or USB) is carried out directly by the instrument: if the USB
port is connected to a PC, the RS232 serial port is automatically disabled.
The instruments are 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:
XY CR+LF
where:
XY
is the command code and
CR+LF
is the Carriage Return (ASCII 0D) +
Line Feed (ASCII 0A).
COMMAND
ACTION
RESPONSE
NOTES
AA
Model request
HD25-2
Turbidimeter
AG
Firmware version
Firmware 1.00.100
AH
Firmware date
Firm.Date=2006/01/09
AS
Serial number
Ser.Number=12345678
AU
User identification
Operator = Administrator
Operator = User_1
Operator = User_2
Operator = User_3
Operator = Anonymous
DA
Input date-time
&/? DA0501010F2615
hexadecimal.
IT REJECTS ANY INCORRECT
DATE
FA
Clock date request
&050101002431 Hexadecimal
FD
Instrument calibration request
&0501010F2615
Hexadecimal
K1
Current measurement print
Increases
ID
