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12.1 Using the RS-232 Port
The RS-232 port is configured with a baud rate of 9600 with 8 Data Bits, 1 Stop Bit, No Parity and no
hardware handshaking.
12.1.1 Connecting and Using a Terminal
An RS-232 connection can be used to connect the STS2/PDU to either a terminal or a PC running terminal
emulation software. If you are unsure of the cable pin out, see 14.2.10 - Terminal Port Connections.
1. Connect the terminal to the STS2/PDU by plugging the cable from the terminal into the RS-232
port. This connection can be made at any time.
2. After making the connection, verify the communications link by pressing <ENTER> on the
terminal keyboard.
The interface communications system responds as indicated below:
Repeating command -->
Illegal command!
<?> or <HELP?> displays the RS-232 command set
<?> <command> or <HELP?> <command> displays specific help for the command SVTP-Control>
The SVTP-Control > prompt indicates that RS-232 communications are established.
• If you receive no response or prompt, verify that the connector is properly plugged into the port
and the PC or terminal serial interface is working properly.
3. Enter the desired commands, as listed in Table 13.
For additional help type <?> <command> or <HELP?> <command>
Refer to the corresponding menu options in 13.0 - Touch Screen Display for more details about the
commands.
Some terminal commands require a password to function. Use the PWD command and a valid pass-
word to gain access.
Table 13 Terminal commands
Keys Function
? Displays this help menu or specific help with a command
AA? Displays active alarms
AF? Displays active faults
CEL Clears the event log
CHL Clears the history logs
DATE? Displays current system date
DATE Sets system date
EL? Displays the entire event log
HELP? Displays this help menu or specific help with a command
HLn? Displays the history log #n, if frozen
LOGOUT Logs user out of unprotected mode
PS? Displays the preferred source
PS n Sets the preferred source to #n
PWD Allows users to access protected commands
QUIT Modem only. Ends the session and hangs up the modem.
SH Silences the horn
SPT? Displays all current setpoints
SPTx Displays current setpoints for group x. See 12.1.2 - Configuring the STS2/PDU via the Terminal for
a description of groups.
SR? Displays status reports
TIME? Displays current system time
TIME Sets system time
UPMDR? Displays metering data
VER? Displays firmware versions