Furman F1000-UPS Guide De L'utilisateur page 12

Response from UPS: $INVALID_PARAMETER<CR>
$AVR = mode<CR>
SET FEEDBACK MODE
Sets the feedback mode to ON (unsolicited) or OFF (polled).
When ON, a message will be sent to the controller every time the status of an input (i.e. button), output (i.e. outlet) or power state
(i.e. overvoltage) changes.
If feedback is OFF, the controller must request status with a query (see Queries section for more details).
Send to UPS: !SET_FEEDBACK mode<CR>
mode = {ON, OFF}
If specified mode is invalid
Action: No action will be taken, UPS will request a valid mode setting
Response from UPS: $INVALID_PARAMETER<CR>
$FEEDBACK = mode<CR>
SET LINEFEED MODE
With LINEFEED MODE set, a linefeed character (<LF>, 10d, 0Ah) is appended to each response.
Send to UPS: !SET_LINEFEED mode<CR>
mode = {ON, OFF}
If specified mode is invalid
Action: No action will be taken, UPS will request a valid mode setting
Response from UPS: $INVALID_PARAMETER<CR>
$LINEFEED = mode<CR>
SET METER BRIGHTNESS
Sets the LCD display and outlet bank indicator brightness.
Send to UPS: !SET_BRIGHT xxx<CR>
xxx = {100, 075, 050, 025}
If specified brightness setting is invalid
Action: No action will be taken, UPS will request a valid brightness setting
Response from UPS: $INVALID_PARAMETER<CR>
$BRIGHTNESS = xxx<CR>
SET DISPLAY SCROLL MODE
Sets the LCD display SCROLL mode
Send to UPS: !SET_SCROLLMODE xxx<CR>
xxx = {5SEC, 10SEC, OFF}
If specified display scroll mode is invalid
Action: No action will be taken, UPS will request a valid mode setting
Response from UPS: $INVALID_PARAMETER<CR>
$SCROLL_MODE = xxx<CR>
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F1000-UPS OWNER'S MANUAL