PL7004 Kit
22 Rev F
3.7.1 RS-232 Operating Protocols
3.7.1.1 Normal Operation Command/Response
This section lists the operating protocols RS-232 on the interface for normal operation.
Communication Protocol
RS-232 (DCE) Port Pinout Diagram DB-9 Female
Pin 1 DCD
Pin 2 TD
Pin 3 RD
Pin 4 DTR
Pin 5 GND
Pin 6 DSR
Pin 7 CTS
Pin 8 RTS
Pin 9 Unused
Information Transfer Protocol
The probe kit only responds to commands from another device. It transmits no data without first receiving
instructions to do so.
All characters are defined by and transferred as common 7 bit ASCII characters.
Command Structure
A command string consists, in sequence, of:
• command letter
• parameter (optional)
• carriage return <CR>
Response Structure
In response to a command, the interface typically responds with a response string, in sequence, of:
• start character colon <:>
• command letter of the received command
• data (optional)
• termination character(s) Note: Beginning with FI7000 firmware revision 2.70, the user can select the
termination character(s) used for response strings.