Liebert POWER PROTECTION STATIC TRANSFER SWITCH User Manual

An RS-232 connection can be used to connect the STS2 to either a terminal or a PC running terminal 

emulation software. If you are unsure of the cable pin out, see 15.2.10 - Terminal Port Connec-

tions.
1. Connect the terminal to the STS2 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:

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 10.
For additional help type <?> <command> or <HELP?> <command>
Refer to the corresponding menu options in the 13.0 - STS2 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 10

? 

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 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

Repeating command -->

Illegal command!

<?> or <HELP?> displays the RS-232 command set

<?> <command> or <HELP?> <command> displays specific help for the command

SVTP-Control >