Cause : CB alarm - The following description refers to the 1st CBP. For other CBs or the TB see the operating instructions for the CB board.

No net data or invalid net data (e.g. complete control word STW1=0) are being received from the DP master.

• Consequence: The process data are not passed on to the dual port RAM. If P722 (P695) is not equal to zero, this will cause the fault message F082 to be tripped.