Start-up procedure and Diagnostics LEDs
Start-up procedure and Diagnostic
After switching on, the ILxxxx-B520 immediately checks the connected configuration. Error-free start-up is signalled by the red "I/O ERR“ LED being extinguished. If the “I/O ERR” LED blinks, an error in the area of the extension boxes 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 ILxxxx-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 ILxxxx-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 ILxxxx-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 ILxxxx-B520 and the connected extension boxes. 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:
Blink code
Fast blinking | Start of the error code |
First slow sequence | Error code |
Second slow sequence | Error code argument |
Error location
Error code | Error code argument | Description |
|---|---|---|
1 pulse | 0 1 2 | EEPROM checksum error Inline code buffer overflow Unknown data type |
2 pulses |
0 n (n > 0) | Programmed configuration Incorrect table entry / Ilxxxx-B520 Incorrect table comparison (extension box n) |
3 pulses | 0 n | Interruption of IP-Link bus Break behind extension box (0: ILxxxx-B520) |
4 pulses | 0 n | IP-Link bus data error (incorrect telegram) Extension box n (0: Ilxxxx-B520) |
5 pulses | n | IP-Link bus error in register communication with extension box n |
6 pulses | 0 n (n > 0) | Special fieldbus error |
11 pulses | n | IR Error, no communication, extension box n is not processing the IR commands |
12 pulses | n | More than 120 extension boxes n extension boxes too much |
13 pulses | n | unknown box type, extension box n |
The number of pulses in the first sequence indicates the error type, while the second sequence indicates the position of the last extension box before the fault.
In the case of some errors, rectification does not cause the ILxxxx-B520 to leave the blink sequence. The ILxxxx-B520 stays in the "Stop" state. The ILxxxx-B520 can only be re-started either by switching the power supply off and on again, or by a scanner reset.