AMX Modula Instruction Manual page 40

Installation and Setup
2.
Establish an RS-232 serial connection with the enclosure.
If using an RS-232 cable for control, follow only the first checklist below FIG. 18.
If using an RS-422 cable for control, follow the first checklist below FIG. 18 to establish an RS-232
connection with the upper serial port. Then follow the second checklist to configure the lower serial
port for RS-422 control.
FIG. 18
Attach null modem cable to serial port
RS-232 null modem serial
Or
RS-422 cable:
Important: After a serial port is configured for RS-422 cable, do not attach an RS-232 cable without
first reconfiguring the port in XNConnect.
34
50-ohm termination connector – attach to non-linked enclosure
Cable to serial control device
cable:
Plug one end of the null modem serial cable into either serial port on the Modula (FIG. 18).
If you will be using an RS-422 for control, be sure to attach the RS-232 cable to the upper
serial port.
Plug the other end of the serial cable into the serial port on the PC
(or serial controller/device).
Open the serial communication software and set the PC port
settings to match the Modula port settings (see table to the
right). In addition to the default baud rate of 9600, Modula
enclosures support baud rates of 19200, 38400, and 57600.
The settings on the PC serial communication software and the
Modula enclosure must correspond to each other. If a change is
required to make them match, changing the PC's settings is
preferable.
If you decide to change the enclosure's settings instead, use
XNConnect (see the Help file).
Use the checklist above to establish serial communication with the enclosure. The RS-232
cable must be plugged into the upper serial port on the Modula enclosure.
Download XNConnect (see page 148) and open the configuration file (page 149) or discover
the system (see page 150).
In the Hardware view, right-click on the icon for the lower serial port and select Change
Settings.
On the Modify Serial Port drop-down menu under Mode, select RS-422 Character (unless
directed by technical support to use RS-422 Block).
After changing the Mode setting, click Download.
Click OK.
Plug one end of the RS-422 serial cable into the lower serial port (DB-9) on the enclosure
(FIG. 18) and the other end into the RS-422 port on the control device.
page 34
baud rate
Modula
Serial Port Settings
Baud Rate 9600
Data Bits 8
Parity None
Stop Bits 1
Flow Control None
Modula Instruction Manual