Configuring Hardware and Communication Connections STEP 7.pdf

Configuring the Distributed I/O (DP)
DP Master from the View of the DP-Slave
You can use the DP-Slave CPU user program, for example, to read DP Master
failure information via the configured diagnostic address 8189.
If you have set the DP Slave to DPV1 mode you can, for example, trigger a
Hardware Interrupt. Here, in the DP Slave user program you must utilize SFC 7
"DP_PRAL" to trigger the interrupt in the DP Master via the configurable address
for the virtual slot 2 (Slot 2). This address is 8188 in our example. The sample
below shows user program segments of the DP Slave that has triggered the
hardware interrupt and user program segments of the DP Master that evaluate this
interrupt.
Configuring Hardware and Communication Connections with STEP 7
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