I/O Terminal /
ERROR HANDLING AND DIAGNOSIS
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8.1.2 Standard-Bus LEDs (Local Errors)
Two LEDs, the Standard-Bus LEDs, indicate the operational state of the Bus Terminals and
the connection to these Bus Terminals. The green LED (I/O RUN) lights up in order to
indicate fault-free operation. The red LED (I/O ERR) flashes with two different frequencies in
order to indicate an error. The errors are displayed in the blink code in the following way:
Error Type
Error
Code
Error
Code
Argument
Description
Remedy
Persistent
continuous
blinking
General Standard-Bus error
Check the Bus Terminal Strip
0
EEPROM checksum error.
Set manufacturer’s setting
with the IDE software
1
Inline code buffer overflow.
Connect fewer Bus Terminals;
too many entries in the table
for the programmed
configuration
1 pulse
2
Unknown data type.
Software update required for
the coupler
0
Programmed configuration
incorrect.
Check programmed
configuration for correctness
2 pulses
n>0
Incorrect table entry Bus
Coupler / incorrect table
comparison (Bus Terminal n).
Correct table entry / Bus
Coupler
No Bus Terminal connected;
attach Bus Terminals
3 pulses
0
Standard-Bus command error
One of the Bus Terminals is
defective; halve the number of
Bus Terminals attached and
check whether the error is still
present with the remaining
Bus Terminals. Repeat until
the defective Bus Terminal is
located.
4 pulses
0
n
Standard Bus data error,
break behind Bus Coupler n.
Check whether the n+1 Bus
Terminal is correctly
connected; replace if
necessary.
Check whether the End
Terminal is connected.
5 pulses
n
Standard-Bus error in register
communication with Bus
Terminal n.
Replace Bus Terminal n.