AERCO BMS II BOILER - Manual (Page 85)

APPENDIX G
G-1
APPENDIX G
_____________________________
PROGRAMMING THE BMS II USING RS-232 COMMUNICATION
Introduction
The RS-232 port located in the wiring compartment area of the BMS II can be used to program
the BMS II using a laptop computer or other suitable terminal. Connection to a laptop or other
terminal device is made by wiring to the RXD, TXD and GND connections (see paragraph 2.9
and Figure 2-12 for pinout information when wiring from a DB9 connector).. Communication can
be accomplished using any “Dumb Terminal” emulation, such as Hyper Terminal which is
included with Microsoft Windows. The RS-232 communication feature allows the BMS to be
easily programmed to your installation requirements using a listing of entry commands.
Set-Up
Regardless of the terminal emulation utilized, the following guidelines must be adhered
to when interfacing the BMS to the Terminal device:
1. Connect cable leads to the RS-232 connector in the wiring area of the BMS II.
2. Connect the free end of the cable to the COM 1 or COM 2 port on your laptop, or other suitable
terminal device.
3. Set up the emulator communication link as follows:
(d) Set the baud rate to 9600.
(e) Set the data format to 8 bits, 1 stop bit, no parity and either Xon/Xoff or No Flow Control.
4. Turn on the BMS II by pressing the ON/OFF key. Verify that the ON LED lights.
5. Press the MENU key. Go to the SETUP MENU and enter a valid PASSWORD.
6. Press the MENU key and go to the RS232 MENU.
7. Press the
▲ arrow key to display the RS232 MODE option.
8. Press the
▲ or ▼ arrow key to display NORMAL. Press the ENTER key to store the NORMAL
selection
9. Start the emulator software program.
10. At the command prompt, enter the password EXACTLY as follows (case-sensitive):
P=gobms
11. Press Return () on your terminal.
12. The setup is now complete. You are ready to begin viewing or changing BMS functions.