Configuring Hardware and Communication Connections STEP 7.pdf

Configuring the Distributed I/O (DP)
3.7.3 Creating an Alarm in the I Slave with SFB75 'SALRM
Intelligent DP slaves with SFB 75 'SALRM' can trigger interrupts in their assigned
DP master. The following table shows the possible types of interrupts depending
on the DP mode setting:
Interrupt Type DP Mode: S7-compatible? DP Mode: DPV1
Diagnostic interrupt (OB 82) Yes Yes
Hardware interrupt (OB 40 to 47) Yes Yes
Insert/remove module interrupt
Yes (if the I slave supports this Yes
(OB 83)
interrupt)
Status interrupt (OB 55) No Yes
Update interrupt (OB 56) No Yes
Vendor-specific interrupt (OB 57) No Yes
Addresses for triggering interrupts
You can use each address configured in the "Configuration" tab in the I slave
configuration dialog to trigger interrupts using SFB 75. These addresses are not
assigned to actual, "real" modules but to virtual "slots".
The addresses for "Slot" 0" (diagnostic address) and "Slot" 2 (Address for "Slot" 2)
cannot be used to trigger interrupts.
Configuring Hardware and Communication Connections with STEP 7
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