Remote Control
Copyright © Itech Electronics Co., Ltd. 48
Chapter5 Remote Control
IT7300 series AC source has four standard communication interface:
LAN RS232, USB, GPIB. IT7321 has standard communication interface
LAN/USB/RS232 You can choose any one of them to communicate with
PC.
5.1 RS232 interface
There is a DB9 connector at the rear of the power supply, when connect to
computer, you need to select a cable with COM port on both side; To act ive you
need to press (Shift)+ (Menu) button to enable the settings in menu to
be the same with the PC communication configuration. You could do the
secondary development with all SCPI commands.
Note
The RS232 settings must match the settings in front panel system information.
If any change, please press (Shift)+ (Menu)key to modify the menu:
SYST SET\COMM.
RS232 data format
RS232 data is a 10-bit word with one start bit and one stop bit.The number of
start bit is not programmable.Stop bit is selectable between 1&2.Besides,you
can set the parity bit in the menu using the front panel (Shift)+ key.
Parity options are stored in a non-volatile memory.
Baudrate
The front panel (Shift)+ (Menu) button allows the user to set
baud rate which is stored in the non-volatile memory: 4800,9600,19200
38400,57600,115200
RS-232 connection
Adopt the RS232 cable with DB-9 interface because the serial port of RS232
can be connected with that of the controller (e.g. PC). The modulating cable of
the air-conditioner is not recommended. The pins of plug are shown as the
following table.
If your computer is provided with a RS232 interface with DB-25 plug, a cable
and a adapter with DB-25 plug (one end) and DB-9 plug (the other end) are
required (not the modulating cable of the air-conditioner)
RS-232 plug pins
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