Configuring Hardware and Communication Connections STEP 7.pdf

Basic Method of Creating Interrupts
Configuring the Distributed I/O (DP)
The basic procedure for creating an interrupt will be shown as it applies to a
diagnostic interrupt.
• In the I slave, the output address 0 in the "Configuration" tab is assigned to a
virtual slot.
• In the example, the output address 0 is used to trigger a diagnostic interrupt
(OB 82) in the DP master.
For each diagnostic interrupt, data must also be input with the user program
(AINFO). These data have to correspond to the basic structure for additional
interrupt information.
For example, you can use the following simplified structure (a detailed description
is available in the manual "System and Standard Functions for S7-300/400" in the
chapter "Diagnostic Data"):
Note
The additional interrupt information has an influence on the module status data and
the "SF" error LED at the I slave. Similarly, the interrupt also influences the module
status data and the error LED at the DP master. For this reason, you must be sure
to observe the meaning of the diagnostic data sets (data set 0 and data set 1)
when providing data for additional information about the interrupt.
Configuring Hardware and Communication Connections with STEP 7
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