Version 1.5 9/02
7
RS-232 PC Communications Interface
RS-232 data format
Baud rate
9600
Parity
none
Data bits
8
Stop bits
1
Flow control
none
RS-232 Connection
Connect the supplied communications cable to the rear of the
power supply and to the communications port of the PC.
Power Supply
PC
Pin 2 ------------------------------ Pin 2 RX
Pin 3 ------------------------------ Pin 3 TX
Pin 4 ------------------------------ Pin 4 DTR
Pin 5 ------------------------------ Pin 5 GND
RS-232 Commands
The command format is as follows: Command Parameter <Carriage Return (cr)>
For example: V 20.5 (sets output to 20.5VDC)
An ASCII code for <Carriage Return> must be sent together with the command or
commands. Commands will not be processed until a <Carriage Return> is received. Note
that the unit can process up to 50 characters. If more than 50 characters are received, the
unit will clear the entire command buffer.
Summary of Commands
STBY <cr>
(place the unit in standby mode)
OPER <cr>
(place the unit in operating mode)
V xx.xxx <cr>
(set the voltage output)
A x.xxx <cr>
(set the current output)
SEC xxx.xx <cr> (enter time in seconds)
OVP xx.xxx <cr> (enter desired voltage value for over-voltage protection)
OCP 0 <cr>
(disable the over-current protection)
OCP 1 <cr>
(enable the over-current protection)
STORE xxx <cr> (store the present output values to memory location xxx)
RECALL xxx <cr> (recall an output setup from memory location xxx)
STEP <cr>
(enable the ATS Auto Test Sequencing function)
? <cr>
(retrieve all data)
V? <cr>
(retrieve the voltage value)
A? <cr>
(retrieve the current value)
OCP? <cr>
(retrieve the status of OCP)
OVP? <cr>
(retrieve the voltage value for OVP)
SEC? <cr>
(retrieve the time value in seconds)
STATUS? <cr>
(retrieve the STBY/OPER, OCP, OVP, & 5V/3.3V fixed output status)
Note
: All commands are case insensitive.
5
3
1
9
7
