Siemens SIMATIC S7-400 Hardware And Installation Manual page 224

Assembling the M7-400
Programming Device for Commissioning or Servicing
For commissioning or servicing purposes, connect the programming device via a
spur line to a node on the MPI subnet. The bus connector of this node must have a
programming device socket for this (see also Chapter 5).
Figure 8-19 shows a network with two M7-400s, to which a programming device is
connected.
PROFIBUS-DP bus cable
Figure 8-19
8-42
www.gkbpx.com
Programming
device
PG cable = spur line
Connecting a Programming Device to an M7-400 Subnet
S7-400 and M7-400 Programmable Controllers, Installation Manual
M7-400
M7-400
C79000-G7076-C424-01