DURAG D-ISC 100 2 Series - Meaning of the Field Bus LED; Meaning of the Internal Communications LED

4 | Installation and commissioning
62
D-ISC 100 x xx2
4.3.7.3.3 Meaning of the field bus LED
No./
colour(s)
LED Status Meaning
3

Duo LED red/greenField bus LED (COM)
green On RUN, cyclical communication
red On Incorrect Profibus DP configuration
red flashes
cyclically
STOP, no communication, connection error
red flashes
acyclically
not configured
Table4.21: Flash code meaning of the field bus LED (COM)
4.3.7.3.4 Meaning of the internal communications LED
No./
colour(s)
LED Status Meaning
4

Duo LED red/greenInternal communication LED (COM)
green On valid configuration for Modbus RTU
device
● ready for
Modbus communication,
● sends/receives
Modbus RTU telegrams
red On Communication error:
Device operates as a
ModbusRTUMaster:
● The slave device has identified an error (Modbus ex-
ception), e.g. function code is not supported, access to
invalid register addresses or coil addresses
● Receive error identified, e.g. parity error or checksum
error
● Timeout occurred (slave device is not responding).
Off Off ● during initialisation
● in the event of an invalid Modbus RTU configuration
● no operating voltage
Table4.22: Flash code meaning of the internal communications LED (COM)