Assembling the M7-400
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S7-400 and M7-400 Programmable Controllers Hardware and Installation
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8.7.6 Starting Up a PROFIBUS-DP Subnet
This Chapter
This section contains the procedures for starting up a PROFIBUS-DP subnet with a
CPU 486-3 or CPU 488-3 as the DP master.
Requirements
Before you can start up the PROFIBUS-DP subnet, the following requirements
must be met:
• The PROFIBUS-DP subnet has been set up (see Chapter 7).
• The M7 system software is installed (see M7-SYS User Manual).
• The central rack is fitted with an interface submodule IF 964-DP. The interface
submodule is connected to the PROFIBUS-DP subnet.
• With STEP 7, you have configured the PROFIBUS-DP subnet and assigned a
PROFIBUS address and the address area to all nodes (see the manual
Configuring Hardware and Communication Connections STEP 7 V 5.2). Note
that for some DP slaves, address switches must also be set (see the reference
manuals for the particular DP slaves).
Starting Up
To start up the PROFIBUS-DP subnet, follow the steps outlined below:
1. Use the programming device to load the configuration of the PROFIBUS-DP
subnet (preset configuration) created with STEP 7 into the CPU. This procedure
is described in the manual Configuring Hardware and Communication
Connections STEP 7 V 5.2.
2. Switch on all DP slaves.
3. Switch the CPU from STOP to RUN.
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