Integration into the User Program
4-30
C7-613 Control System
A5E00138934-03
Acknowledgement
Fault messages are used to display extraordinary operating states. You therefore
have to acknowledge the fault messages by setting a bit in the acknowledgement
area. The position of the acknowledgement area is specified with the “ACKS”
parameter. You can alternatively acknowledge:
• By pressing the ENTER key
The “HMI EVENT“ FB recognizes that the “ENTER” key was pressed and sets
the corresponding bit in the acknowledgement area. The fault message is then
considered acknowledged and is no longer displayed. Reading out the
acknowledgement area shows that the message was acknowledged.
• By setting a bit in the acknowledgement area
The message is acknowledged in the user program by setting the bit in the
acknowledgement area. The “HMI EVENT“ FB evaluates the acknowledgement
area. The fault message is then considered acknowledged and is no longer
displayed.
Acknowledgement Area
You must provide an acknowledgement bit for each message bit. The
acknowledgement area must have the same length as the message area.
Assignment of the Acknowledgement Bit to the Message Number
Each fault message has a message number. The same bit x of the message area
and the same bit x of the acknowledgement area are assigned to this message
number, respectively.
9
8
16
24
70
1
Bit
Message No. 1
Message Area
17
Acknowledgement bit for Message No. 1
Acknowledgement Area
9
8
16
24
70
1
Bit
17
Figure 4-4 Assignment of Acknowledgement Bit and Message Number
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