Configuration Notes:
With STEP 7 V5.1 there is a new structure and different behavior of the group messages for the HMI systems. Previously there were seven group messages. There are now 21 group messages in the new version. The seven original messages are contained in three groups of seven. The following table lists the new messages.
 

Message	Group
AS fault synchronous incoming AS fault asynchronous incoming Module fault incoming Stop/abort fault incoming H/F system fault incoming Communications fault incoming Fault in CP/FM module incoming	Group 1
AS fault synchronous outgoing AS fault asynchronous outgoing Module fault outgoing Stop/abort fault outgoing H/F system fault outgoing Communications fault outgoing Fault in CP/FM module outgoing	Group 2
Message about AS fault synchronous Message about AS fault asynchronous Message from module Stop/abort message H/F system message Communications message Message from CP/FM module	Group 3

The three groups always contain the same messages for the different status options of the message (incoming, outgoing, status unknown).
Because of the properties of the message class "OS Instrumentation and Control Message" the IC messages do not have an "incoming/outgoing" display in the message line. Therefore an extra "incoming" and the "outgoing" message is sent for each individual message.
The message of the type "outgoing" is however only displayed when the message of the type "incoming" has also been acknowledged beforehand. If not, then the message is not displayed again.

Group 3 is needed, because after an update of the message picture or WinCC ON/OFF (struck-out message), a status is no longer available. With this type of message supplementary values are transferred with the event ID and these values contain the status information. Since the message is always of the type "incoming" here, it can only be indicated that a message of this type was here. The user must then look in the diagnostics buffer of the CPU himself to find out the reason for the message.

Below is the assignment of the organization blocks in STEP 7 to the individual group messages. This list does not presume to be complete. It is rather an indication of the possible causes. The user has to find the associated detailed information in the diagnostics buffer of the CPU based on the time stamp of the message concerned.

Message	Detailed information in the CPU
AS fault synchronous	OB121, OB122
AS fault asynchronous	All OB8x
Module fault	OB82, OB83, OB86
Stop/abort fault	Stop and abort events direct
H/F system fault	OB71, OB72
Communications fault	OB87
Fault in CP/FM module	CPs and FMs direct to WinCC

Keywords:
BPC, Basic Process Control, Wizard, IC message