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Function documentation Repeating or Resending an Acknowledged Telegram Locate the document in its SAP Library structure

Use

EWM sends telegrams automatically as soon and as long as the relevant communication channel is synchronized. Synchronization means that after a connection has been established by EWM the PLC has been given the opportunity to send all messages that accumulated during the period of disconnection. The PLC transmission buffer is thus empty. The PLC sends an acknowledgment of receipt for the telegram received, whereupon EWM posts it as sent.

If there is no acknowledgment, EWM repeats the telegram (after a period of time configurable at the channel, such as 5 seconds). Unacknowledged telegrams are thus automatically repeated by EWM.

In certain cases it is necessary to manually resend an already acknowledged telegram (if the PLC was subject to malfunction status following an error and unintentionally deleted the telegram while a user was rectifying the problem manually, for example). In this case, you can resend the telegram from within the telegram log.

For test purposes, you also have the option of first manipulating the telegram that is to be sent (meaning simulating a telegram that cannot be produced or is difficult to produce in the intended way to test it). In the process, you can change all the fields provided as standard. For example, you can enter a different HU number or a different communication point as the destination. Use this function during the test phase only - not when you go live. You can ensure this by assigning the appropriate authorizations.

Prerequisites

You have called the warehouse management monitor via the following initial view: SAP Easy Access  ® Extended Warehouse Management  ® Monitoring ® Warehouse Management Monitor.

Activities

Select the desired telegram and choose Other Methods ® Tel. Repeat Send. Decide whether the system is to pull a new run number for the telegram or use the original one. An already acknowledged run number may be discarded by the PLC as a repetition (that is, acknowledged but not processed). The system then resends the telegram.

 

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