Starting Up
6-2
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
6.1
Recommended Procedure for First Startup
Recommended Procedure
Due to the modular assembly and the many expansion options, an S7-400 can be
very extensive and complex. A first startup of an S7-400 with two or more racks
and all modules inserted is therefore not advisable. Instead, a startup in stages is
recommended.
When commissioning an H system, you should first start up each subsystem
separately, as described in this chapter, before connecting both subsystems
together to form a complete system.
The following procedure is recommended for the first startup of an S7-400:
1. Carry out the checks listed in Table 6-1.
2. First start the CR with the power supply module and CPU inserted (see
Section 6.4). If you are setting up your assembly in a segmented rack, you must
insert both CPUs at the beginning for the first startup.
Check the LED indicators on the two modules. The meanings of these LED
indicators can be found in the Reference Manual Module Specifications,
Chapters 3 and in the reference manual CPU Data.
3. Insert additional modules in the CR, one at a time, and start them up one at a
time.
4. If required, connect the CR to ERs by inserting one or more send IMs in the CR
and the matching receive IM in the ER.
In the case of ERs with their own power supply modules, switch them on first
and then the power supply module of the CR.
5. Insert additional modules in the ERs one at a time and start them up one after
the other.
How to Proceed in the Case of an Error
If an error occurs, you can proceed as follows:
– Check your system by means of the checklist in Section 6.2.
– Check the LED indicators on the modules. Meanings of these indicators can
be found in the chapters containing the descriptions of the relevant modules.
– If necessary, remove individual modules to locate faults.
