turck IM18-CCM51-12I, Nstructions For Use, Page: 14 / 20

Operation
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9 Operation
9.1 LED indications
LED Indication Meaning
Pwr Green Device is operational
Green flashing (2 Hz) Device waiting to be assigned a bus address
Green flashing (4 Hz) Bus address is assigned
Red Device error
Com Green flashing (4 Hz) Communication via the backplane bus active
Red flashing (4 Hz) Invalid data packet received
9.2 Reading the memory
The device is provided with an internal memory in order to retain the data even in the event of
a power supply interruption. The following values are stored:
n
Channel configuration (channel on/off, set signal frequency)
n Operating hours counter
n
Number of accumulated errors (the last 224 accumulated errors and operating hours). Refer
to the library for a list of error codes.
The data is stored automatically in the device after 30 minutes in the event of configuration
changes or errors.
In normal operation, the operating hours counter is backed up automatically every 30 minutes.
In the event of power supply interruptions, the counter is automatically reset to the last backed
up state.