Checks Prior To Switching On For The First Time - Siemens SIMATIC S7-400 Hardware And Installation Manual

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
Racks
Are the racks secured on the wall, in the frame or cabinet?
Have the necessary clearances been allowed?
Are cable ducts or fan subassemblies correctly installed?
Is the ventilation in order?
Grounding and Chassis Ground Concept
Is there a low-impedance connection (large surface, large-
area contact) to the chassis ground?
On all racks, is the connection between reference ground
and chassis ground correct (metallic connection or ungroun-
ded operation?)
Are all grounds of the non-isolated ded modules and the
grounds of the load current power supplies connected to the
reference points?
Mounting and Wiring Modules
Are all modules correctly inserted and screwed on?
Are all front connectors correctly wired, plugged into the right
modules, and screwed on?
Are any necessary cable ducts or fan subassemblies fitted
correctly?
Module Settings
Is the CPU mode switch set to STOP?
Are the numbers of the racks correctly set on the coding
switches of the receive IMs and not duplicated?
If measuring range modules are fitted on the analog input
modules, are they correctly set?
Have the rules for connection been observed?
Have the correct cables been used for connections to exi-
sting ERs?
S7-400 and M7-400 Programmable Controllers, Installation Manual
C79000-G7076-C424-01
www.gkbpx.com
Points to be Checked
Starting Up
See See
Installation Reference
Manual Manual
Chapter Chapter
2
2
2
2
2
4
2
2
4
2
6 4
7
5, 6
2
2, 4 7
6-3