BECKHOFF IPxxxx-B520 - Manual (Page 34)

Indicators and Switches
31 IPxxxx-B520
10 Indicators and Switches
10.1 Start-up procedure and Diagnostics LEDs
Start-up procedure and
Diagnostic
After switching on, the IPxxxx-B520 immediately checks the configuration.
Error-free start-up is signalled by the red "I/O ERR“ LED being extin-
guished. If the “I/O ERR” LED blinks, an error is indicated. The error code
can be determined from the frequency and number of blinks. This permits
rapid rectification of the error. There is a detailed description in the section
on "The diagnostic LEDs".
The diagnostic LEDs The IPxxxx-B520 has two groups of LEDs for the display of status. The
upper group with two LEDs indicates the status of the respective fieldbus.
The significance of the “fieldbus status“ LED is explained in the relevant
sections of this manual - it conforms to conventional fieldbus displays.
On the bottom of the IPxxxx-B520 are two more green LEDs that indicate
the supply voltage. The left hand LED indicates the presence of the 24 V
supply for the IPxxxx-B520. The right hand LED indicates the presence of
the supply to the power contacts.
Local errors Two LEDs, the “I/O LEDs”, in the area below the field bus status LEDs
referred to above, serve to indicate the operating status of the IPxxxx-
B520. The green LED lights up in order to indicate fault-free operation. The
red LED blinks with two different frequencies in order to indicate an error.
The error is encoded in the blinks as follows:
Fast blinking Start of the error code
First slow sequence Error code
Blink code
Second slow sequence Error code argument
Error location
Error code Error code ar-
gument Description
1 pulse 0
1
2 EEPROM checksum error
Inline code buffer overflow
Unknown data type
2 pulses 0 Programmed configuration
Incorrect table entry / IPxxxx-B520
3 pulses 0 IP command error
4 pulses 0 IP data error
5 pulses 0 IP error in register communication
6 pulses 0
n (n > 0) Special fieldbus error
The number of pulses in the first sequence indicates the error type, while
the second sequence indicates the position of the the fault.
In the case of some errors, rectification does not cause the IPxxxx-B520 to
leave the blink sequence. The IPxxxx-B520 stays in the "Stop" state. The
IPxxxx-B520 can only be re-started either by switching the power supply off
and on again, or by a scanner reset.