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Communication Interface T8151B
Issue 21 Apr 10 PD-T8151B 44
4.2. Module Status LEDs
There are ten status LEDs on the Communications Interface front panel; Healthy, Active, Standby,
Educated, and six Communications.
The module status LED states and their meanings are described as follows:
LED INDICATION
Healthy Module health:
Steady green = healthy
Flashing red = slice failed.
Active Steady green when the module is in the Active mode.
Standby Not used.
Educated Not used. Set to steady green at power-up.
Communications Six tri-coloured LEDs indicate data transfer activity on all serial
communications ports and both Ethernet ports.
The LEDs flash red when responding and green when receiving.
The Ethernet LEDs indicate steady green in the absence of a network
connection (for 8151 up to rev H and 8151B up to rev B only)
Table 16 Pre Build C, module status LED’s
LED INDICATION
Healthy Module health:
Steady green = healthy
Flashing red = slice failed.
Active Steady green when the module is in the Active mode. (application running,
communications enabled)
Standby Steady green when the module is in the Standby mode. (application stopped,
communications disabled)
Educated CI configuration loaded successfully from MP
Communications Six tri-coloured LEDs indicate data transfer activity on all serial
communications ports and both Ethernet ports.
The LEDs flash red when transmitting data and green when receiving and
amber when transmitting and receiving.
Table 17 Build C, module status LED’s