Example For A Fault Message; Fault Code 4: Internal Bus Data Fault; Fault Code 6: Fieldbus Specific Error; Fault Code 7: I/O Module Is Not Supported - WAGO -I/O-SYSTEM 750 User's Installation And Configuration

44 • Fieldbus coupler 750-342
LED Display

Fault code 4: Internal bus data fault

Fault code 5: Fault during register communication

Fault code 6: Fieldbus specific error

Fault code 7: I/O module is not supported

Fault code 8: not used
Fault code 9: CPU-TRAP error
* The number of blink pulses (n) indicates the position of the I/O module. I/O modules
without data are not counted (i.e. supply modules without diagnostics).

Example for a fault message

Fault: The 13th I/O module has been removed.
1. The "I/O" LED starts the fault display with the first blink sequence (approx.
2. The second blink phase (approx. 1 Hz) follows the first pause. The "I/O"
3. The third blink sequence follows the second pause. The "I/O ERR" LED
There are two green LED's in the coupler supply section to display the supply
voltage. The left LED (A) indicates the 24 V supply for the coupler. The right
hand LED (C) signals the supply to the field side, i.e. the power jumper con-
tacts.
LED
A
green
OFF
C
green
OFF
0 Data fault on internal bus or
Internal bus interruption on coupler
n* (n>0) Internal bus interrupted after I/O module n
n* Internal bus fault during register communication after I/O module n
1 No reply from the BootP server
2 ETHERNET controller not recognized
3 Invalid MACID
4 TCP/IP initialization error
n* I/O module at position n is not supported
0 Fault code 8 is not used.
1 Illegal Opcode
2 Stack overflow
3 Stack underflow
4 NMI
10 Hz).
LED blinks four times and thus signals the fault code 4 (internal bus data
fault).
blinks twelve times. The fault argument 12 means that the internal bus is
interrupted after the 12
Meaning
Operating voltage for the system exists.
No operating voltage for the system.
Operating voltage for the power jumper contacts
exists.
No operating voltage for the the power jumper con-
tacts.
th
I/O module. Supply voltage status
Trouble shooting
Check the supply voltage (24V and 0V).
Check the supply voltage (24V and 0V).
Modular I/O System
ETHERNET TCP/IP