Siemens S7-400 Recommended Procedure for First Startup, How to Proceed in the Case of an Error

Commissioning

6.1Recommended 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 installing an S7-400 in a segmented rack, you must insert both CPUs for the preliminary commissioning phase.

Check the LED indicators on the two modules. The meanings of these LED indicators can be found in the Reference Manual Module Specifications, Chapter 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.

6-2	Automation System S7-400	Hardware and Installation
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