Gpib / Rs-232 Interface Command List - Extech Instruments 7470 Operation Manual

DTR (pin 4), DSR (pin 6) CTS (pin 8) and RTS (pin 7). If the port cannot be configured
through software to ignore the lines then the handshake lines should be jumpered
together in two different sets. Pins 4 and 6 jumpered together and pins 7 and 8
jumpered together at the controller end of the cable.
When sending command over the RS232 bus the instrument will send a response
string of 06 hex or 6 decimal, the Acknowledge (ACK) ASCII control code if the transfer
was recognized and completed by the instrument. If there is an error with the
command string that is sent, the instrument will respond with 15 hex or 21 decimal, the
Not Acknowledge (NAK) ASCII control code. The ACK or NAK response allows for
software handshaking, to monitor and control data flow. When requesting data from
the instrument, it will automatically send the data back to the controller input buffer.
The controller input buffer will accumulate data being sent from the instrument including
the ACK and NAK response strings, until it has been read by the controller.

9.8. GPIB / RS-232 Interface Command List

A GPIB read command must be sent after the command strings, to retrieve any data
from a query command (?). The High Withstand Voltage Tester GPIB bus will not
send any data to the controller without being queried. The RS-232 bus will
automatically send any response back to the controller's input buffer. Each command
string should be terminated by the ASCII control code, New Line <NL>, OAh or the
end of line EOL message for GPIB.
The following conventions are used to describe the commands syntax for High
Withstand Voltage Tester. Braces ({ }) enclose each parameter for a command string.
Triangle brackets (< >) indicate that you must substitute a value for the enclosed
parameter. The Pipe ( | ) is used to separate different parameter options for a
command, select one of these as the data for the command.
When sending the command none of the previous mentioned characters should be
included, they are only for reference purposes in this manual. Nor should quotation
(" ") marks be include when sending the commands. Also the command and the
parameter data must be separated with a space.
All commands that end with a question mark (?) are query commands and required an
IEEE-488 read command to retrieve the data from the device's output buffer.
9.8.1. Test Execution Commands
The following commands are used to control actual output voltage and current from the
instrument. Please observe all safety precautions.
Command
TEST
RESET
SACG
Description
Execute a Test
Abort a test in Process or Reset Failures
Set Auto-Charge-LO
59