CM 772F PROFIBUS-DP Master Interface Section 3 Modules
40 M&I – AC 900F Controller
LED status displays
After having been switched on, the CI 772 PROFIBUS module performs a self-test
during power-up. If the test is successfully performed, the yellow LED RDY lights
up, if not, the LED starts to flash and the initialization is aborted. If the LED RDY
does not light up at all, the PROFIBUS module is probably defective. During
initialization, with newly configured modules or after a change of the operating
mode, all LEDs may light up briefly before reaching the defined status.
Controller redundancy support No
Hot plug No
HCIR No
LED Color Status Meaning
PWR Green ON Voltage is applied
OFF No voltage is applied
RDY Yellow ON Coupler ready for operation
Cyclic flashing Boot loader is active
Non-cyclic flashing Hardware or system error
OFF Defective hardware
RUN Green ON Communication on
Cyclic flashing Ready for communication
Non-cyclic flashing Parameterization error
OFF No communication
STA Yellow ON DP master: data or token are transmit-
ted via the network
OFF DP master: No token
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