Festo FB16 Electronic Manual page 143

VIFB16 - 03/05
NET (green)
off No communication through the field
bus.
Possible causes:
• no PS program active
• switched off or faulty device field
• interrupted, short-circuited or
flashing Communication normal on the field
bus or:
flash frequency app. 2 Hz while
switching on the terminal and
during the initialisation phase.
ERR (red)
off Valve terminal O.K.
flashing Terminal switch-on or initialisation
(flash phase on the field bus or:
frequenz communication error. Possible causes:
• device field bus circuit switched
app. 2 Hz)
• interrupted, short-circuited or
flashing Module installation faulty.
• more than 12 I/O modules
(long off)
• number of I/Os not supported by
• type of module not permitted.
flashing Hardware fault.
(short off)
I/O ERR (red)
off Valve terminal O.K.(flash frequency
app. 2 Hz during terminal switch-on
and initialisation phase).
on Terminal bus fault (operating
voltages VVEN, VAUS or VSEN
below the tolerance, short
circuit/overload of an output).
* When the operating voltage for the terminal is switched on, the LEDs NET,
GRR and I/O flah simultaneously (switch-on and initialization phase). If they
do not cease to flash, the set field bus address is already occupied by
another slave. Error handling: Switch off the operating voltage and set another
(unreserved) field bus address in the node of the terminal.
Fig. 5/3: LED display operating status
0506b
5. Diagnosis/error treatment
bus circuit
damaged field bus connection
off or defective
damaged field bus connection
installed.
protocol.
Check...
• field bus circuit
• field bus connection
None
or: wait for the
initialisation phase, correct
any faults.
None
Wait for the initialisation
phase, correct any faults* or:
Check ...
• field bus circuit
• field bus connection
• reduce number of I/O
modules
• reduce number of I/Os
installed
• use only permitted
module types.
Service call
None
wait for the initialisation
phase, correct any faults.
Precise analysis of the
status bits or the diagnosis
word STATUS A. Fault
must be corrected.
• Check the operating
voltages at Pin 1 and Pin 2.
• Eliminate short
circuit/overload.
5-5