Honeywell HC900 User Manual

Communications Installation - Connecting the HC900 Controller to a PC with the Hybrid Control Designer Software 

Revision 5 

  HC900 Hybrid Controller Installation and User Guide 

97 

9/03  

 

Connect the modem to a PC. If your PC’s RS-232 port has a 25-pin connector, use a DB-25 
male to DB-25 female RS-232 cable.  If your PC’s RS232 port has a 9-pin connector, use a 
DB-25 male to DB-9 female modem cable. 

Connect power to the modem. 

Power up the modem. 

Run a serial communication port program such as Hyperterminal. 

Within the communication program, select the port to which the modem is connected. 

Configure the port to these settings: 

baud rate = 9600, 19200, or 38400, 57600 (Must match Baud Rate configured in HC900  
  

Controller) 

data bits = 8 
parity = none 
stop bits = 1 
flow control = none 

In the program's terminal window, restore factory defaults by keying-in the following command 
string: 

AT &F0 

Then, press the ENTER key. 

In the program’s terminal window, key-in the following command string: 

AT E1 Q0

 

Then, press the ENTER key.  The Modem should respond with 

OK

. 

Key-in the following command string: 

AT &Y0 &C0 &D0 &R1 &S0 &K0 S0=1

 

Then, press the ENTER key.  The Modem should respond with 

OK

.

 

Key-in the following command string: 

AT E0 Q1 &W0

 

Then, press the ENTER key.  The Modem will not respond.

Power down the modem and disconnect it from the PC. 

Connect the modem to the RS-232 port of the HC900 Controller using a DB-25 male to DB-9 
male RS-232 cable.  

Connect the modem to a telephone jack. 

Power up the modem and the HC900 Controller. 

On a remote computer, run Hybrid Control Designer software. 

Set up the PC software to dial the HC900 Controller. 

Use the PC software "Loop-back" feature to verify that communications are established with 
the remote HC900 Controller.