Fronius DeviceNet Instructions De Service page 53

K bus / operating The K bus LEDs (operating status LEDs) monitor local communications between
status LEDs (lo- the field bus coupler and field bus terminals. The green LED lights when there
cal errors) are no errors. The red LED flashes at two different intervals if a terminal bus er-
ror occurs.
Flash code
Error code
1 pulse
2 pulses
3 pulses
4 pulses
5 pulses
6 pulses
IMPORTANT! When an error occurs during operation, the error code is not
immediately indicated on the LEDs. The bus coupler must be requested to per-
form a diagnosis of the bus terminals. The diagnosis request is generated after
switching on, or is requested by the master.
(a) (b)
Error argument
0
1
2
0
n (n<0)
0
0
n (n<0)
n (n<0)
0
n (n<0)
a) Rapid flashing:
Start of the error code
b) First slow pulse:
Type of error
c) Second slow pulse:
Error location
IMPORTANT! The number of pulses
indicates the location of the last field
(c)
bus terminal prior to where the error
occurred. Passive field bus terminals
(e.g. supply terminals) are not counted.
Description
EEPROM check sum error
Inline code buffer overflow
Unknown data type
Programmed configuration
Incorrect table entry/bus coupler
Terminal(s) table comparison incorrect
Terminal bus command error
Terminal bus data error
Break behind terminal(s) (0:coupler)
Terminal bus error during register commu-
nication with terminal(s)
Special field bus error
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