Rockwell Automation 1203 Serial Communications Module Series A - Manual (Page 50)

Chapter 6
Troubleshooting
6-2
ATTENTION: Do not attempt to defeat or override fault circuits.
The cause of a fault indication must be determined and corrected
before attempting operation. Failure to correct a drive or system
malfunction may result in personal injury and/or equipment
damage due to uncontrolled machine system operation.
Table 6.A
LED Troubleshooting Table
Indicator Color Description Recommended Action
Serial Sts Green (Blinking) Link OK, off-line Check configuration switch settings,
check for serial cable connection,
cycle Communications Module power
Green (Steady) Link OK, on-line None, system functioning properly
Red (Steady) Faulted Check configuration switch settings,
check for serial cable connection,
cycle power, replace module
SCANport Sts Green (Blinking) Link OK, not connected Check configuration switch settings,
check for serial cable connection,
cycle power
Green (Steady) Link OK, connected None
Red (Steady) Faulted Check configuration switch settings,
check for serial cable connection,
cycle power, replace module
TX Off No transmission occurring Send serial data again
Amber Transmission occurring None
RX Off No transmission received Check data device to verify it is sending
data
Amber Transmission being received None