Error code 249

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IsoBus defective or overloaded

Alarm at Maistro, Drill and Maestro.

Maistro (249-3)

Drill (249-1)

Maestro (249-2)

When does the alarm occur?

The internal buffer for IsoBus messages is overflowing (1000 messages could not be sent).

The IsoBus is faulty or has a very high bus load (over 90%) over a longer period of time. This is why our job computer cannot send its messages for UT, TC and data logger.

Does a Drilling error (drilling drop-out) occur?

Yes!

What to do?

Restart the system.

Check the IsoBus

* Change the terminal or tractor. Use a base station if possible.
* If this corrects the error, then the previous terminal/tractor caused the error.
* If the error is still present, check the wiring in the HORSCH machine.
Check the wiring from the IsoBus connector to the master job computer.
Attention: Some machines have additional systems (SmartCan/liquid monitoring/IsoBus scales/etc.) that are also connected to the IsoBus. Check the wiring to these systems as well.

If no external damage is recognisable, then remove devices from the IsoBus one by one and observe whether this rectifies the fault. Then do the same with the wiring to the participants.

For experts:

In the Service Tool there is a status LED at the bottom left which displays the bus status.

* Green = no bus errors
* Red/Yellow = bus error

PCan View can also be used for more precise diagnostics to recognise when the bus is faulty and when the fault can be rectified by disconnecting it.

Is there an audible indication?

single audible signal

How is the alarm confirmed?

Press ESC to confirm

Terms of use

Note: The assistance operations given in the present application may only be carried out observing the safety notes in the operating instructions of the corresponding machine. Compensation claims for damages due to non-observance of the operating instructions are excluded.