Allen-Bradley Bulletin 1203 Series User Manual page 70

6–2 Troubleshooting
Indicator
Serial Sts
SCANport Sts
1203–5.5 September 1995
!
!
LED Troubleshooting Table
Color
Green (blinking)
Green (steady)
Red (blinking)
Red (steady)
Green (blinking)
Green (steady)
Link was connected and is now
Red (blinking)
Red (steady)
TX Off
Flash
RX Off
Flash
ATTENTION: Servicing energized industrial control
equipment can be hazardous. Electrical shock, burns,
or unintentional actuation of controlled industrial
equipment may cause death or serious injury. Follow
the safety-related practices of NFPA 70E, Electrical
Safety for Employee Workplaces, when working on or
near energized equipment. Do not work alone on
energized equipment.
ATTENTION: Do not attempt to defeat or override
fault circuits. You must determine and correct the
cause of a fault indication 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.
Description
Link OK, off–line
Link OK, on–line None, system functioning properly
Link was on–line and is now
Check for failed devices or link problems.
off–line
Faulted
Link OK, not connected
Link OK, connected None
Check for failed devices or link problems.
not connected
Faulted
No transmission occurring
Transmission occurring None
No transmission received
Characters being received None
Recommended Action
Check configuration switch settings.
Check for serial cable connection.
Cycle Serial Communications Module power.
Check configuration switch settings.
Check for serial cable connection.
Cycle power, replace module.
Check configuration switch settings.
Check for serial cable connection.
Cycle power.
Check configuration switch settings.
Check for serial cable connection.
Cycle power, replace module.
Send serial data again
Check data device to verify it is sending data