Fault table for K-Bus interruption
Examples of fault indications in the event of communication interruption on the K-bus
Error | Display | Specific | Possible | Remedy |
---|---|---|---|---|
no data transmission on the K-bus and K-bus extension | LED ERR of the Coupler Terminals KL9050 are on | LED I/O ERR of the higher-level Fieldbus Coupler flashes rapidly | K-bus or K-bus extension was interrupted | After any interruption of the data transmission on the K-bus, the higher-level Fieldbus Coupler requires a reset in order to restart the data transmission or to locate the fault. |
LED ERR of the Coupler Terminals KL9050 are on
I/O ERR LED of the higher-level Fieldbus Coupler flashes after switching on in succession (flashing code):
|
| The Ethernet cable of a K-bus extension is not plugged in correctly | Fault after the n-th Bus Terminal: ensure that the RJ45 plug is connected correctly. | |
| The Function Switch of the last Coupler Terminal is not in position Last | Set the Function Switch to Last! | ||
| Wrong Ethernet cable | Fault after the n-th Bus Terminal: Do not use a crossed Ethernet cable for K-Bus extension! | ||
LED Power Vk of the affected Coupler Terminal is not on | Supply voltage of a coupler terminal has failed | Check the supply voltages of the bus terminal block after the n-th Bus Terminal | ||
LED ERR of the Coupler Terminals KL9050 are on | LED I/O ERR of the higher-level Fieldbus Coupler flashes rapidly | Ethernet cable too long | The length of the Ethernet cable between two terminal blocks must not exceed 5 m. | |
The overall length of the K-bus extension must not exceed 155 m (31 x 5 m). | ||||
Ethernet cable defective | Check the Ethernet cable. | |||
| Wrong End Terminal installed: The End Terminal with RJ45 socket (KL9020) is only used at the bus terminal block with the Fieldbus Coupler. | All extension terminal blocks must be terminated with the standard end terminal (KL9010)! See Notes on the topology of the K-bus extension. |
Please see the documentation of your Fieldbus Coupler for further error codes (m¹4) and the associated error arguments.