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The port entered must be the serial port connected to the NCM either
directly or via a modem. (See Establishing a Connection later in this
section.) The allowable serial ports and their configuration defaults are
shown in the table below. If you do not specify a port, the NT Emulation
software will communicate via COM2.
Port
Port Baud Rate Port Address IRQ
COM1 9600 3F8 4
COM2 9600 2F8 3
COM3
9600 3E8 4
COM4 9600 2E8 3
HOSTESS1
9600 2E0 3
HOSTESS2 9600 2E8 3
HOSTESS3 9600 2F0 3
HOSTESS4
9600 2F8 3
Table 6: PC Serial Port Configuration Defaults
The baud_rate specified must match the baud rate defined for the NT
port at the Network Control Module (NCM). Standard value is
9600 baud; however, if you are using a PC with a 8086 processor or a
286 processor running at less than 14 MHz, and you are using a mouse
that is interrupt driven, you need to lower the baud rate to 2400 for
optimum efficiency. The NT Emulator supports baud rates of 300, 1200,
2400, 4800, and 9600. For instructions on changing the baud rate
defined for the NT port, see
Defining Devices in your Operator
Workstation User’s Manual , and the Reference section of your DDL
Programmer’s Manual.
Baud Rate
Note: If you do not own these manuals, contact your local Johnson
Controls office for help.
Network Terminal User’s Manual 53