Honeywell HC900 User And Installation Manual page 154

Modem configuration examples
Below are procedures for setting up the following commercially available modems:

3Com US Robotics 56K Data/Fax External Modem

Zoom 56K Dualmode External Modem (page 142)

Best Data 56SX Data Fax External Modem (page 143)

SixNet VT-MODEM Industrial External Modem (page 144)
3Com US Robotics 56K Data/Fax External Modem
Step
1
Ensure that the switches are set to the factory settings:
Switch
1
2
3
4
5
6
7
8
Connect the modem to a PC. If your computer's RS-232 port has a 25-pin connector, use a
2
DB-25 male to DB-25 female RS-232 cable. If your computer's RS-232 port has a 9-pin
connector, use a DB-25 male to DB-9 female modem cable.
3
Power-up the modem.
4
Run a serial communication port program such as Hyperterminal.
5
Within the communication program, select the port to which the modem is connected.
6
Configure the port to these settings:
7
In the program's terminal window, restore factory defaults by keying-in the following command
string:
AT &F0
Then, press the ENTER key.
The modem should respond with OK.
140
Setting Position
OFF UP
OFF UP
ON DOWN
OFF UP
ON DOWN
OFF UP
OFF UP
ON DOWN
baud rate = 1200, 2400, 4800, 9600, 19200, 38400, 57600 (Must match Baud Rate
configured in HC900 Controller)
data bits = 8
parity = none
stop bits = 1
flow control = none
HC900 Process & Safety Controller User and Installation Manual
Action
Function
Normal DTR operations
Verbal (word) results
Enable result codes
Displays keyboard commands
Disables auto answer
Modem sends CD signal when it connects with another
modem
Loads Y0-Y4 configuration from user-defined
nonvolatile memory (NVRAM)
Enables recognition (smart mode)
Revision 6
21 April 2017