Internal Process Codes 
You can use internal process codes to define how the system is to react to exceptions.
Process code |
Description |
Context/step |
Use |
BOVF |
The PLC reports a telegram buffer overflow. |
MF1 / A0 |
The EWM system ignores the confirmation telegram according to the wait time that has been set. As a result, the telegram is automatically repeated. |
COMM |
Set status on communication channel. |
MF1 / A0 |
The EWM system does not trigger any additional action. The system sets the status on the communication channel. You can utilize the options for exception handling (for example, alert or workflow). |
REST |
Restart of communication channel. |
MF1 / A0 |
The EWM system stops the affected communication channel and restarts it. |
SEQW |
The PLC rejects the run number of the telegram sent by the EWM system. (For example, because the PLC memory has been deleted and the PLC is therefore no longer able to decide whether or not the run number received is valid.). |
MF1 / A0 |
The EWM system resets the run number and resends the current telegram with the sequence number 0. The sequence number 0 counts as a reset and is always accepted by the recipient. |
CRCL |
Move HU to clarification storage bin |
MF2 / A0 MF2 / A1 MF3 / A0 MF5 / A0 MF5 / A1 |
The EWM system updates the exception on the HU. It cancels all open warehouse tasks for the HU and creates a new warehouse task for the HU for the clarification bin. |
NSND |
A communication point or a segment is malfunctioning, locked, or has no free capacity. You nevertheless want to create a warehouse task, which you do not, however, want to send to the PLC. |
MF2 / A0 MF2 / A1 MF4 / A0 MF4 / A1 MF5 / A0 MF5 / A1
|
The EWM system creates the warehouse task for the HU but does not send it. |
STAY |
A communication point or a segment is malfunctioning, locked, or has no free capacity. You therefore do not want to generate a warehouse task. |
MF2 / A0 MF2 / A1 MF4 / A0 MF4 / A1 MF5 / A0 MF5 / A1 |
The EWM system does not create a warehouse task for the HU. |
BINE |
A stacker crane reports that the storage bin passed on as the From bin in a warehouse task is physically empty. |
MF3 / A0 |
The EWM system cancels all warehouse tasks for the HU and attempts to create new warehouse tasks. |
BINO |
A stacker crane reports that the storage bin passed on as the To bin in a warehouse task is physically occupied. |
MF3 / A0 |
The EWM system attempts to determine a new, empty storage bin. As a result, the current warehouse task is changed and the telegram with the new data immediately sent. |
HUNO |
a) The PLC reports that an unidentifiable HU has passed a scanner. b) The PLC reports an HU that is not known in EWM. |
MF3 / A0 |
The EWM system creates a new, empty HU and conveys it to the clearing bin. |
NOCN |
Cancellation not possible |
MF3 / A0 |
The system changes the indicator WT to Subsystem in the warehouse task from 1 - Cancellation Request Relevant to External System to X - WT Sent to External System. |
Example using the internal process code HUNO:
The PLC reports the error NOREAD (with error code 10, for example) in the telegram.
You translate this error code into the exception MUFO in Customizing.
You define the error text Noread at scanner for the exception MUFO.
The follow-on action alert leads to an entry "Noread at scanner xxx“ in the alert monitor.
The internal process code HUNO causes EWM to draw a new HU number, internally create a new HU, and transfer the HU to the clarification bin.