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8
Communications Protocol
Connector Pin-out:
Pin 2, Transmit. The MB1000 transmits data on this pin.
Pin 3, Receive. The MB1000 receives data on this pin.
Pin 5, SG (signal ground).
Baud Rate: 2400bps
Start Bits: 1
Data Bits: 8
Stop Bits: 1
Parity: None
Flow Control: None
Controller Commands
Commands and responses are in the form of ASCII character
strings terminated with a carriage return <CR> ASCII character
13 (hex).
If the state variable LINEFEED MODE = ON, a linefeed charac-
ter (<LF>, 0Ah, 10d) will follow the carriage return.
Incoming messages (to the MB1000) shall be terminated with
one of the following characters: NUL (00h, 00d),
carriage return (<CR>, 0Dh, 13d) or line feed (<LF>, 0Ah, 10d).
The MB1000 shall discard the incoming message under the fol-
lowing conditions:
The message overruns the receiver buffer (32 characters).
No terminating character (NUL, <CR>, <LF>) is received within
500ms of receipt of the last character.
The following are commands sent by the controlling equipment
to the MB1000.
Note: Responses are only transmitted if unsolicited feedback is
enabled (!SET_FEEDBACK)
ALL ON
Turns on all outlets. Turn on is immediate with no delay.
Send to UPS: !ALL_ON<CR>
_____________________________________________
If power is not switched off due to low battery conditions:
Action: Turn on Outlet Bank 1
Response from UPS: $BANK 1 = ON<CR>
_____________________________________________
If UPS battery level > Shutoff Threshold
Action: Turn on Outlet Bank 2
Response from UPS: $BANK 2 = ON<CR>
_____________________________________________
If UPS battery level < Shutoff Threshold
Action: Turn off Outlet Bank 2
Response from UPS: $BANK 2 = OFF<CR>
$BATTERY = charge%<CR>
_____________________________________________
Action: Activate Power Button
Response from UPS: $BUTTON = ON<CR>
_____________________________________________
ALL OFF
Turns off all outlets. Turn off is immediate with no delay.
Send to UPS: !ALL_OFF<CR>
Action: All outlets will turn off
Response from UPS: $BANK 1 = OFF<CR>
Response from UPS: $BANK 2 = OFF<CR>
Response from UPS: $BUTTON = OFF<CR>
RS-232 Communications Protocol & Command Set
Pin 2 -Transmit
Pin 3 - Receive Pin 3 - Receive
Pin 2 -Transmit
1
6
2
7
3
8
4
9
5
1
6
2
7
3
8
4
9
5
Pin 5 - Signal Ground
RS232 Pin-out