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 extinguished. 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:
Blink code | Description |
|---|---|
Fast blinking | Start of the error code |
First slow sequence | Error code |
Second slow sequence | Error code argument |
Error code | Error code argument | 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.