Siemens Automation System S7-400 - Manual (Page 131)

Commissioning
6-3
Automation System S7-400 Hardware and Installation
A5E00850741-01
6.2 Checks Prior to Switching On for the First Time
Checks Prior to Switching On for the First Time
After installing and wiring your S7-400, it is advisable to check the steps carried out
so far, before switching on for the first time.
Table 6-1 contains a guide in the form of a checklist for your S7-400, and refers to
the chapters containing additional information on the subject.
Table 6-1 Checklist to be Used Before Switching On for the First Time
Points to be Checked See
Installation
Manual
Chapter
See Reference
Manual
“Module
Specification”
Chapter
See Reference
Manual “CPU
Data” Chapter
Racks
Are the racks secured on the wall, in
the frame or cabinet?
2
Have the necessary clearances been
allowed?
2
Are cable ducts or fan subassemblies
correctly installed?
2
Is the ventilation in order? 2
Grounding and Chassis Ground Concept
Is there a low-impedance connection
(large surface, large-area contact) to
the chassis ground?
2
On all racks, is the connection bet-
ween reference ground and chassis
ground correct (metallic connection or
ungrounded operation?)
4
Are all grounds of the non-isolated
ded modules and the grounds of the
load current power supplies connec-
ted to the reference points?
2
Mounting and Wiring Modules
Are all modules correctly inserted and
screwed on?
2
Are all front connectors correctly wi-
red, plugged into the right modules,
and screwed on?
4
Are any necessary cable ducts or fan
subassemblies fitted correctly?
2