Rockwell Automation 999 IMC S Class Compact Motion Controller (Cat. No. 4100-999-122) - Manual (Page 57)

Installation and Hookup 4-15
Publication 999-122 - January 1997
Serial Communications
Devices
The IMC-S/23x provides two optically-isolated serial ports called
Serial Port A and Serial Port B. These ports are accessible through the
9-pin AT-compatible DB-9 connectors on the front panel. Both front
panel connectors are pinned out identically, so connection to either port
is the same.
Serial port A is used for communicating with the GML development
system and serial port B is used for a serial operator interface device
for setup and actual machine operation if DH-485 is not used. When
DH-485 is used, serial port B on the motion controller is used for
DH-485 communication and the normal built-in operator interface
functions of the IMC S Class are unavailable. When DH-485 is used,
do not make any connections to serial port B on the motion controller.
Serial Communication Protocol
When configured for RS-232 or RS-422, both serial ports communicate
using the standard ASCII character codes at a user selectable baud rate.
As shipped from the factory, both serial ports are configured for a baud
rate of 9600. Configure serial communications devices for the serial
protocol defined below for proper operation with the IMC-S/23x:
!
ATTENTION: Do not connect anything to Serial
Port B if you are using DH-485.
IMC-S/23x Default Serial Communication Protocol
Parameter Value
Baud Rate
Start Bits
Stop Bits
Word Length
Parity
XON/XOFF
9600 (others may also be specified)
1
1
8 (7 Data Bits plus Parity)
Ignored
(May be Even, Odd, Mark, or Space)
ON