AERCO BMS 168 - Manual (Page 77)

Appendix J
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PROGRAMMING THE BMS USING RS-232 COMMUNICATION
Introduction
The RS-232 port on the left side of the BMS can be used to program the BMS using a laptop
computer or other suitable terminal. Connection to a laptop or other terminal device is made
using a 9-pin RS-232 adapter cable. 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 a 9-pin serial cable to the RS-232 connector near the lower left corner of the BMS
front panel.
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:
(a) Set the baud rate to 9600.
(b) 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 by pressing the ON key. Verify that the ON LED lights.
5. Press the FIELD ADJ key on the BMS to enter the Field Adjust Mode. Verify that the FIELD
ADJ LED lights.
IMPORTANT
The RS232 MODE setting MUST be set to NORMAL to permit the
BMS functions to be programmed via the RS232 port.
6. Press the AIR TEMP key until RS232 MODE is shown in the top line of the display. If
necessary, press the ▲ or ▼ arrow key until NORMAL appears in the second line of the
display.
7. Press the FIELD ADJ key to exit the Field Adjust Mode. Verify that the FIELD ADJ LED
goes off.
8. Start the emulator software program.
9. At the command prompt, enter the password EXACTLY as follows (case-sensitive):
P=gobms
10. Press Return () on your terminal.
11. The setup is now complete. You are ready to begin viewing or changing BMS functions.
J - 1