Rockwell Automation 1790P-T4T0 CompactBlock LDX I/O Thermocouple Modules - Manual (Page 53)

Publication 1790-UM003A-EN-P
Diagnostics and Troubleshooting 4-3
Power-up Diagnostics Power-up diagnostics includes module status and network status.
Module Status
At module power-up, a series of internal diagnostic tests are performed.
These diagnostic tests must be successfully completed. The following
table shows module status LED indictor operation.
Network Status
The network status LED indicator shows the condition of the network
connection. The following tables show network status LED indicator
operation.
Table 4.1
1790D-4T0/T4T0, 1790P-4T0
LED Indicator: Status: Description:
Module Status Solid Red Unrecoverable fault
Flashing Red Recoverable fault
Solid Green Normal operation - OK
Flashing Green Standby
Off No power
Table 4.2 1790D-4T0/T4T0 LED Descriptions
LED Indicator Status Description:
Network Status Solid Red Unrecoverable communication fault
Flashing Red Recoverable communication fault
Solid Green Communication path complete - OK
Flashing Green Communication path incomplete
Off Device not online or not powered
Table 4.3 1790P-4T0 LED Descriptions
LED Indicator Status Description
Network Status Solid Green Communication path complete - OK
Flashing Green Communication path incomplete
Off No power or baud rate search