Led Indicators; Typical Installation Of Fb-Diag⁄Ff⁄Li - Phoenix Contact Fieldbus FB-DIAG/FF/LI User Manual

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Figure 2-5 Typical installation of FB-DIAG⁄FF⁄LI
2.4

LED indicators

There are two green and one red LED on the FB-DIAG⁄FF⁄.... The LEDs provide low-level
indication depending on circumstances existing on the segment or by self-diagnostics of the
FB-DIAG⁄FF⁄....
All of the LEDs illuminate for 0.5 s upon initial startup. This shows that all LEDs are
functional. All flash rates are 50 ±2% duty factor at the respective flash rates.
If an error occurs, the LEDs will flash two full duty cycles before returning to the original
state, once the error has been removed.
For example:
– The FB-DIAG⁄FF⁄... is joined to the network and communicating correctly. The PWR
LED and COMM LED are illuminated solid.
– The shield is shorted to T+ for a moment. The ERR LED flashes to indicate this error.
The ERR LED will flash for two cycles (2.8 Hz * 2) continuously, until the error is cleared.
– If a retransmit is detected, the LED will flash two times for each retransmit. For example,
if there are three retransmits, the LED flashes six times. At the time the error is cleared,
the COMM LED will flash for two additional cycles (1.4 Hz * 2)
Table 2-1 shows the LED reaction based on different states:
Installation
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