Instruction Manual

Publication 1790-UM002A-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 Module Status Power-up Diagnostics
1790D-4R0/T4R0, 1790P-T4R0
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 Network Status Power-up Diagnostics for 1790D-4R0/T4R0)
1790D-4R0/T4R0
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 Network Status Power-up Diagnostics for the 1790P-T4R0
1790P-4R0
LED Indicator: Status: Description:
Network Status Solid Green Communication path complete - OK
Flashing Green Communication path incomplete
Off No power or baud rate search