Rockwell Automation 1747-DTAM-E,D17476.1 Data Table Access Module (DTAM) - Manual (Page 82)

9-2 Troubleshooting
Publication 1747-6.1
TROUBLESHOOTING CONSIDERATIONS
COMMUNICATIONS
INDICATOR
DESCRIPTION PROBABLE CAUSES RECOMMENDED ACTION
OFF Module does not power up Bad cable connection
1. Verify proper connections
on the module.
2. Verify proper connections
to processor or link coupler.
3. Replace 1747-C10 Cable.
Power supply overloaded
Evaluate chassis backplane
loading for proper sizing of
power supply.
No power to link coupler if on
DH485 network
If no processor is connected to
link coupler, provide 190mA or
24 VDC to screw terminals on
link coupler.
Defective chassis power
supply
1. Check for proper power
supply connections.
2. Check for proper power
suplly voltage.
3. Replace power supply.
4. Disconnect module. Call
your Allen-Bradley service
representative.
ILLUMINATED RED During power up Normal None.
During self diagnostics Normal None.
Hardware malfunction Defective power supply
1. Check for proper power
supply voltage.
2. Replace power supply.
3. Disconnect module. Call
your Allen-Bradley service
representative.
Software malfunction Diagnostic failure 1. Consult error code on
module display.
2. Reset module.
3. Cycle power to module.
FLASHING RED Illegal network connection
Improper module setup
configuration
Refer to module display.
ILLUMINATED GREEN Communicating on network
Module configured for Monitor
mode
None.
FLASHING GREEN Communicating on network
Module configured for Modify
mode
None.
Data being entered in Monitor
Override mode
None.