Siemens S7-400 - Connecting a Programming Device (PG) to an S7-400

Starting Up
6-5
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
Table 6-2 Setting the Battery Monitoring Switch
If You ...
...Then
do not use battery monitoring, set the BATT INDIC switch to OFF.
use battery monitoring with a single-width
power supply module,
set the BATT INDIC switch to BATT.
want to monitor a backup battery with a
double or triple-width power supply module,
set the BATT INDIC switch to 1BATT.
want to monitor two backup batteries with a
double or triple-width power supply module,
set the BATT INDIC switch to 2BATT.
6.3 Connecting a Programming Device (PG) to an S7-400
Connecting a Programming Device (PG) to an S7-400
You must connect the programming device via a connecting cable to the MPI of the
CPU. This allows access via the communication bus to all CPUs and
programmable modules.
PG cable
S7-400
Programming device
Figure 6-1 Connecting PG to an S7-400
Note
The programming device is not ungrounded. To operate the S7-400 in an
ungrounded configuration, you must connect the programming device via an
RS 485 repeater (see Reference Manual Module Specifications, Chapter 10).