Chapter 3 Front-Panel Operation
RS-232 Interface Configuration
52
RS-232 Interface Configuration
You connect the power supply to the RS-232 interface using the 9-pin (DB-9)
serial connector on the rear panel. The power supply is configured as a DTE
(Data Terminal Equipment) device. For all communications over the RS-232
interface, the power supply uses two handshake lines: DTR (Data Terminal
Ready, on pin 4) and DSR (Data Set Ready, on pin 6).
The following sections contain information to help you use the power supply
over the RS-232 interface. The programm ing commands for RS-232 are
explained on
page 101.
RS-232 Configuration Overview
Configure the RS-232 interface using the parameters shown below. Use the
front-panel
key to sel ect the baud rate, parity, and number of data bits
(see page 47 for more inform atio n to configure from the front panel).
• Baud Rate: 300, 600, 1200, 2400, 4800, or
9600
baud (
factory setting
)
• Parity and Data Bits:
None / 8 d ata bits
(
factory setting
)
Even / 7 data bits, or
Odd / 7 data bi ts
• Number of Start Bits:
1 bit
(
fixed
)
• Number of Stop Bits:
2 bits
(
fixed
)
RS-232 Data Frame Format
A character
fram e
consists of all the transmitted bits that make up a single
character. The frame is defined as the characters from the
start bit
to the last
stop bit
, inclusively. Within the frame, you can select the baud rate, number of
data bits, and parity type. The power supply uses the following frame forma ts
for seven and eight data bits.
I/O
Config
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